[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:01.05,0:00:02.89,Default,,0000,0000,0000,,在这一期视频里，我们将学习关系模型。
Dialogue: 0,0:00:03.85,0:00:05.34,Default,,0000,0000,0000,,关系模型已有超过
Dialogue: 0,0:00:05.57,0:00:07.49,Default,,0000,0000,0000,,35年历史，
Dialogue: 0,0:00:07.69,0:00:09.37,Default,,0000,0000,0000,,是数据库管理系统的基础。
Dialogue: 0,0:00:09.92,0:00:12.01,Default,,0000,0000,0000,,数以十亿计的产业由此产生。
Dialogue: 0,0:00:13.61,0:00:15.42,Default,,0000,0000,0000,,目前所有
Dialogue: 0,0:00:15.70,0:00:17.80,Default,,0000,0000,0000,,商业数据库系统采用关系模型。
Dialogue: 0,0:00:18.55,0:00:21.36,Default,,0000,0000,0000,,事实上它非常简单，这也是它优点之一。
Dialogue: 0,0:00:22.41,0:00:23.74,Default,,0000,0000,0000,,此外，它是可检索的。
Dialogue: 0,0:00:24.50,0:00:25.32,Default,,0000,0000,0000,,这里指我们可以
Dialogue: 0,0:00:25.56,0:00:26.92,Default,,0000,0000,0000,,用高级语言
Dialogue: 0,0:00:26.98,0:00:28.86,Default,,0000,0000,0000,,查询数据库。
Dialogue: 0,0:00:29.99,0:00:31.47,Default,,0000,0000,0000,,高级语言是简单的，
Dialogue: 0,0:00:31.84,0:00:34.28,Default,,0000,0000,0000,,用于查询数据库时可读性极高。
Dialogue: 0,0:00:35.38,0:00:36.90,Default,,0000,0000,0000,,最后一点，非常重要的，
Dialogue: 0,0:00:37.45,0:00:39.80,Default,,0000,0000,0000,,是可以高效的实现
Dialogue: 0,0:00:39.97,0:00:41.70,Default,,0000,0000,0000,,关系模型
Dialogue: 0,0:00:41.89,0:00:43.29,Default,,0000,0000,0000,,及其查询语言。
Dialogue: 0,0:00:43.76,0:00:45.00,Default,,0000,0000,0000,,让我们继续
Dialogue: 0,0:00:45.13,0:00:47.44,Default,,0000,0000,0000,,了解关系模型的基础构建。
Dialogue: 0,0:00:48.66,0:00:51.44,Default,,0000,0000,0000,,首要的构建是关系。
Dialogue: 0,0:00:51.98,0:00:53.39,Default,,0000,0000,0000,,一个数据库是由
Dialogue: 0,0:00:53.43,0:00:54.93,Default,,0000,0000,0000,,一系列关联或者
Dialogue: 0,0:00:55.39,0:00:57.53,Default,,0000,0000,0000,,署名的"表"组成。
Dialogue: 0,0:00:58.40,0:01:00.62,Default,,0000,0000,0000,,在我们的例子中有两组关系。
Dialogue: 0,0:01:01.99,0:01:03.13,Default,,0000,0000,0000,,我们的例子是一个
Dialogue: 0,0:01:03.58,0:01:05.10,Default,,0000,0000,0000,,学院申请人的模拟数据库。
Dialogue: 0,0:01:05.48,0:01:07.47,Default,,0000,0000,0000,,现在我们分开看学生和学院。
Dialogue: 0,0:01:08.50,0:01:09.46,Default,,0000,0000,0000,,我们有两个表，
Dialogue: 0,0:01:09.97,0:01:11.18,Default,,0000,0000,0000,,命名为
Dialogue: 0,0:01:11.85,0:01:14.23,Default,,0000,0000,0000,,学生和学院。
Dialogue: 0,0:01:15.34,0:01:16.42,Default,,0000,0000,0000,,顺便提一点，
Dialogue: 0,0:01:16.62,0:01:17.83,Default,,0000,0000,0000,,数据库行业里有一个
Dialogue: 0,0:01:18.23,0:01:19.82,Default,,0000,0000,0000,,关于表名应该是单数还是负数的
Dialogue: 0,0:01:20.31,0:01:22.62,Default,,0000,0000,0000,,有益的争论。
Dialogue: 0,0:01:23.31,0:01:24.98,Default,,0000,0000,0000,,我个人觉得无所谓。
Dialogue: 0,0:01:25.20,0:01:26.05,Default,,0000,0000,0000,,我就用单数吧。
Dialogue: 0,0:01:27.98,0:01:29.75,Default,,0000,0000,0000,,接下来，我们要讲属性。
Dialogue: 0,0:01:30.34,0:01:31.79,Default,,0000,0000,0000,,每一个关系和
Dialogue: 0,0:01:32.27,0:01:33.87,Default,,0000,0000,0000,,关系数据库都有一个事先
Dialogue: 0,0:01:34.39,0:01:37.11,Default,,0000,0000,0000,,命名的列或者属性。
Dialogue: 0,0:01:37.76,0:01:39.11,Default,,0000,0000,0000,,在学生表单里，
Dialogue: 0,0:01:39.79,0:01:40.72,Default,,0000,0000,0000,,比如说每一个学生
Dialogue: 0,0:01:41.12,0:01:42.01,Default,,0000,0000,0000,,都有一个ID,
Dialogue: 0,0:01:42.84,0:01:46.31,Default,,0000,0000,0000,,名字，GPA 和照片。
Dialogue: 0,0:01:46.99,0:01:48.12,Default,,0000,0000,0000,,在学院表单里，
Dialogue: 0,0:01:48.71,0:01:49.83,Default,,0000,0000,0000,,比如说
Dialogue: 0,0:01:50.03,0:01:50.88,Default,,0000,0000,0000,,每一个学院都有
Dialogue: 0,0:01:51.00,0:01:54.09,Default,,0000,0000,0000,,一个名字，州，招生人数。
Dialogue: 0,0:01:55.17,0:01:56.44,Default,,0000,0000,0000,,我们简写成 ENR。
Dialogue: 0,0:01:57.66,0:01:58.53,Default,,0000,0000,0000,,这些都是标好的列。
Dialogue: 0,0:01:59.81,0:02:01.01,Default,,0000,0000,0000,,现在的数据
Dialogue: 0,0:02:01.50,0:02:02.32,Default,,0000,0000,0000,,被存储在
Dialogue: 0,0:02:02.43,0:02:04.74,Default,,0000,0000,0000,,表单的元组（或者行）里。
Dialogue: 0,0:02:05.69,0:02:06.82,Default,,0000,0000,0000,,让我们在表里
Dialogue: 0,0:02:06.99,0:02:09.18,Default,,0000,0000,0000,,录入一些数据组。
Dialogue: 0,0:02:09.30,0:02:11.53,Default,,0000,0000,0000,,让我们从
Dialogue: 0,0:02:12.14,0:02:13.63,Default,,0000,0000,0000,,学生开始，比如说
Dialogue: 0,0:02:14.12,0:02:15.43,Default,,0000,0000,0000,,第一个学生的ID是123。
Dialogue: 0,0:02:15.60,0:02:18.05,Default,,0000,0000,0000,,名字是Amy，
Dialogue: 0,0:02:18.48,0:02:21.79,Default,,0000,0000,0000,,GPA 3.9， 她对此很满意。
Dialogue: 0,0:02:21.90,0:02:22.60,Default,,0000,0000,0000,,所以有一张微笑的相片。
Dialogue: 0,0:02:23.72,0:02:25.29,Default,,0000,0000,0000,,我们的第二个学生是234，
Dialogue: 0,0:02:26.13,0:02:28.32,Default,,0000,0000,0000,,Bob， 他的GPA
Dialogue: 0,0:02:29.68,0:02:29.88,Default,,0000,0000,0000,,是 3.4 .
Dialogue: 0,0:02:30.08,0:02:30.85,Default,,0000,0000,0000,,对此他并不开心。
Dialogue: 0,0:02:32.05,0:02:32.97,Default,,0000,0000,0000,,通常，
Dialogue: 0,0:02:33.13,0:02:35.09,Default,,0000,0000,0000,,一张表有上千，
Dialogue: 0,0:02:35.36,0:02:37.07,Default,,0000,0000,0000,,或者上百万，甚至上亿的
Dialogue: 0,0:02:37.21,0:02:40.39,Default,,0000,0000,0000,,行，每一行的每一个属性都有对应的值。
Dialogue: 0,0:02:41.31,0:02:42.62,Default,,0000,0000,0000,,在学院表单中，我们假设
Dialogue: 0,0:02:43.11,0:02:44.03,Default,,0000,0000,0000,,当然
Dialogue: 0,0:02:44.18,0:02:46.63,Default,,0000,0000,0000,,我们从Stanford开始
Dialogue: 0,0:02:46.77,0:02:49.72,Default,,0000,0000,0000,,California，招生人数是15000.
Dialogue: 0,0:02:52.31,0:02:53.87,Default,,0000,0000,0000,,
Dialogue: 0,0:02:54.77,0:02:55.52,Default,,0000,0000,0000,,
Dialogue: 0,0:02:56.25,0:02:58.11,Default,,0000,0000,0000,,
Dialogue: 0,0:02:58.66,0:03:00.57,Default,,0000,0000,0000,,
Dialogue: 0,0:03:01.27,0:03:03.81,Default,,0000,0000,0000,,
Dialogue: 0,0:03:04.17,0:03:05.50,Default,,0000,0000,0000,,
Dialogue: 0,0:03:05.56,0:03:07.56,Default,,0000,0000,0000,,
Dialogue: 0,0:03:08.33,0:03:09.53,Default,,0000,0000,0000,,
Dialogue: 0,0:03:09.67,0:03:11.04,Default,,0000,0000,0000,,
Dialogue: 0,0:03:11.10,0:03:12.27,Default,,0000,0000,0000,,
Dialogue: 0,0:03:12.40,0:03:13.80,Default,,0000,0000,0000,,
Dialogue: 0,0:03:15.05,0:03:16.64,Default,,0000,0000,0000,,
Dialogue: 0,0:03:16.87,0:03:18.22,Default,,0000,0000,0000,,
Dialogue: 0,0:03:18.71,0:03:19.90,Default,,0000,0000,0000,,
Dialogue: 0,0:03:19.93,0:03:21.21,Default,,0000,0000,0000,,
Dialogue: 0,0:03:21.91,0:03:23.04,Default,,0000,0000,0000,,
Dialogue: 0,0:03:23.94,0:03:25.04,Default,,0000,0000,0000,,
Dialogue: 0,0:03:25.19,0:03:26.35,Default,,0000,0000,0000,,
Dialogue: 0,0:03:26.60,0:03:27.92,Default,,0000,0000,0000,,
Dialogue: 0,0:03:28.18,0:03:29.60,Default,,0000,0000,0000,,
Dialogue: 0,0:03:29.93,0:03:31.67,Default,,0000,0000,0000,,
Dialogue: 0,0:03:32.93,0:03:34.16,Default,,0000,0000,0000,,
Dialogue: 0,0:03:34.58,0:03:36.53,Default,,0000,0000,0000,,
Dialogue: 0,0:03:37.01,0:03:38.43,Default,,0000,0000,0000,,
Dialogue: 0,0:03:38.72,0:03:40.66,Default,,0000,0000,0000,,
Dialogue: 0,0:03:40.99,0:03:42.55,Default,,0000,0000,0000,,
Dialogue: 0,0:03:43.51,0:03:45.02,Default,,0000,0000,0000,,
Dialogue: 0,0:03:45.04,0:03:46.48,Default,,0000,0000,0000,,
Dialogue: 0,0:03:46.67,0:03:47.92,Default,,0000,0000,0000,,
Dialogue: 0,0:03:48.38,0:03:50.18,Default,,0000,0000,0000,,
Dialogue: 0,0:03:50.40,0:03:52.07,Default,,0000,0000,0000,,
Dialogue: 0,0:03:52.44,0:03:53.74,Default,,0000,0000,0000,,
Dialogue: 0,0:03:54.28,0:03:55.46,Default,,0000,0000,0000,,
Dialogue: 0,0:03:58.55,0:03:59.39,Default,,0000,0000,0000,,
Dialogue: 0,0:04:00.30,0:04:01.34,Default,,0000,0000,0000,,
Dialogue: 0,0:04:01.38,0:04:04.11,Default,,0000,0000,0000,,
Dialogue: 0,0:04:04.59,0:04:07.01,Default,,0000,0000,0000,,
Dialogue: 0,0:04:07.43,0:04:09.00,Default,,0000,0000,0000,,
Dialogue: 0,0:04:09.29,0:04:11.38,Default,,0000,0000,0000,,
Dialogue: 0,0:04:12.14,0:04:13.31,Default,,0000,0000,0000,,
Dialogue: 0,0:04:13.41,0:04:15.99,Default,,0000,0000,0000,,
Dialogue: 0,0:04:16.35,0:04:17.24,Default,,0000,0000,0000,,
Dialogue: 0,0:04:17.36,0:04:19.02,Default,,0000,0000,0000,,
Dialogue: 0,0:04:19.49,0:04:21.81,Default,,0000,0000,0000,,
Dialogue: 0,0:04:23.92,0:04:25.86,Default,,0000,0000,0000,,
Dialogue: 0,0:04:26.66,0:04:28.00,Default,,0000,0000,0000,,
Dialogue: 0,0:04:28.48,0:04:29.68,Default,,0000,0000,0000,,
Dialogue: 0,0:04:29.76,0:04:31.24,Default,,0000,0000,0000,,
Dialogue: 0,0:04:31.35,0:04:32.59,Default,,0000,0000,0000,,
Dialogue: 0,0:04:32.73,0:04:34.34,Default,,0000,0000,0000,,
Dialogue: 0,0:04:35.39,0:04:36.76,Default,,0000,0000,0000,,
Dialogue: 0,0:04:36.91,0:04:38.27,Default,,0000,0000,0000,,
Dialogue: 0,0:04:38.98,0:04:41.28,Default,,0000,0000,0000,,
Dialogue: 0,0:04:42.65,0:04:44.22,Default,,0000,0000,0000,,
Dialogue: 0,0:04:44.58,0:04:46.93,Default,,0000,0000,0000,,
Dialogue: 0,0:04:47.63,0:04:49.68,Default,,0000,0000,0000,,
Dialogue: 0,0:04:50.12,0:04:51.67,Default,,0000,0000,0000,,
Dialogue: 0,0:04:51.81,0:04:53.22,Default,,0000,0000,0000,,
Dialogue: 0,0:04:53.53,0:04:54.63,Default,,0000,0000,0000,,
Dialogue: 0,0:04:55.12,0:04:56.81,Default,,0000,0000,0000,,
Dialogue: 0,0:04:57.54,0:04:58.74,Default,,0000,0000,0000,,
Dialogue: 0,0:04:59.21,0:05:00.53,Default,,0000,0000,0000,,
Dialogue: 0,0:05:01.62,0:05:03.31,Default,,0000,0000,0000,,
Dialogue: 0,0:05:04.43,0:05:06.93,Default,,0000,0000,0000,,
Dialogue: 0,0:05:07.22,0:05:08.25,Default,,0000,0000,0000,,
Dialogue: 0,0:05:08.34,0:05:09.73,Default,,0000,0000,0000,,
Dialogue: 0,0:05:10.56,0:05:12.10,Default,,0000,0000,0000,,
Dialogue: 0,0:05:12.81,0:05:14.89,Default,,0000,0000,0000,,
Dialogue: 0,0:05:15.69,0:05:16.75,Default,,0000,0000,0000,,
Dialogue: 0,0:05:17.16,0:05:17.85,Default,,0000,0000,0000,,
Dialogue: 0,0:05:18.29,0:05:19.57,Default,,0000,0000,0000,,
Dialogue: 0,0:05:19.92,0:05:21.02,Default,,0000,0000,0000,,
Dialogue: 0,0:05:21.66,0:05:23.20,Default,,0000,0000,0000,,
Dialogue: 0,0:05:23.65,0:05:24.71,Default,,0000,0000,0000,,
Dialogue: 0,0:05:24.82,0:05:25.91,Default,,0000,0000,0000,,
Dialogue: 0,0:05:25.99,0:05:26.69,Default,,0000,0000,0000,,
Dialogue: 0,0:05:26.94,0:05:28.26,Default,,0000,0000,0000,,
Dialogue: 0,0:05:29.13,0:05:30.29,Default,,0000,0000,0000,,
Dialogue: 0,0:05:30.36,0:05:31.61,Default,,0000,0000,0000,,
Dialogue: 0,0:05:31.80,0:05:32.90,Default,,0000,0000,0000,,
Dialogue: 0,0:05:33.41,0:05:35.06,Default,,0000,0000,0000,,
Dialogue: 0,0:05:36.04,0:05:37.33,Default,,0000,0000,0000,,
Dialogue: 0,0:05:37.46,0:05:38.38,Default,,0000,0000,0000,,
Dialogue: 0,0:05:38.93,0:05:40.02,Default,,0000,0000,0000,,
Dialogue: 0,0:05:40.72,0:05:43.07,Default,,0000,0000,0000,,
Dialogue: 0,0:05:43.49,0:05:44.50,Default,,0000,0000,0000,,
Dialogue: 0,0:05:44.94,0:05:45.84,Default,,0000,0000,0000,,
Dialogue: 0,0:05:46.07,0:05:47.14,Default,,0000,0000,0000,,
Dialogue: 0,0:05:47.40,0:05:48.84,Default,,0000,0000,0000,,
Dialogue: 0,0:05:48.98,0:05:50.58,Default,,0000,0000,0000,,
Dialogue: 0,0:05:50.95,0:05:52.64,Default,,0000,0000,0000,,
Dialogue: 0,0:05:52.74,0:05:53.75,Default,,0000,0000,0000,,
Dialogue: 0,0:05:53.83,0:05:54.90,Default,,0000,0000,0000,,
Dialogue: 0,0:05:55.76,0:05:56.94,Default,,0000,0000,0000,,
Dialogue: 0,0:05:57.59,0:05:59.36,Default,,0000,0000,0000,,
Dialogue: 0,0:05:59.66,0:06:00.64,Default,,0000,0000,0000,,
Dialogue: 0,0:06:01.09,0:06:02.21,Default,,0000,0000,0000,,
Dialogue: 0,0:06:02.33,0:06:04.08,Default,,0000,0000,0000,,
Dialogue: 0,0:06:04.23,0:06:05.23,Default,,0000,0000,0000,,
Dialogue: 0,0:06:05.40,0:06:06.38,Default,,0000,0000,0000,,
Dialogue: 0,0:06:06.49,0:06:08.16,Default,,0000,0000,0000,,
Dialogue: 0,0:06:08.72,0:06:10.07,Default,,0000,0000,0000,,
Dialogue: 0,0:06:10.40,0:06:11.63,Default,,0000,0000,0000,,
Dialogue: 0,0:06:11.76,0:06:12.83,Default,,0000,0000,0000,,
Dialogue: 0,0:06:13.05,0:06:14.24,Default,,0000,0000,0000,,
Dialogue: 0,0:06:14.64,0:06:15.70,Default,,0000,0000,0000,,
Dialogue: 0,0:06:16.00,0:06:18.70,Default,,0000,0000,0000,,
Dialogue: 0,0:06:18.97,0:06:20.66,Default,,0000,0000,0000,,
Dialogue: 0,0:06:20.75,0:06:22.12,Default,,0000,0000,0000,,
Dialogue: 0,0:06:22.50,0:06:23.79,Default,,0000,0000,0000,,
Dialogue: 0,0:06:23.92,0:06:26.32,Default,,0000,0000,0000,,
Dialogue: 0,0:06:27.07,0:06:28.03,Default,,0000,0000,0000,,
Dialogue: 0,0:06:28.13,0:06:29.16,Default,,0000,0000,0000,,
Dialogue: 0,0:06:29.46,0:06:31.11,Default,,0000,0000,0000,,
Dialogue: 0,0:06:32.36,0:06:33.83,Default,,0000,0000,0000,,
Dialogue: 0,0:06:33.97,0:06:35.11,Default,,0000,0000,0000,,
Dialogue: 0,0:06:35.74,0:06:37.06,Default,,0000,0000,0000,,
Dialogue: 0,0:06:38.21,0:06:41.16,Default,,0000,0000,0000,,
Dialogue: 0,0:06:42.48,0:06:43.59,Default,,0000,0000,0000,,
Dialogue: 0,0:06:43.99,0:06:45.07,Default,,0000,0000,0000,,
Dialogue: 0,0:06:45.41,0:06:48.60,Default,,0000,0000,0000,,
Dialogue: 0,0:06:49.54,0:06:50.33,Default,,0000,0000,0000,,
Dialogue: 0,0:06:50.41,0:06:51.96,Default,,0000,0000,0000,,
Dialogue: 0,0:06:52.15,0:06:54.56,Default,,0000,0000,0000,,
Dialogue: 0,0:06:54.96,0:06:56.12,Default,,0000,0000,0000,,
Dialogue: 0,0:06:56.25,0:06:58.13,Default,,0000,0000,0000,,
Dialogue: 0,0:06:59.64,0:07:02.22,Default,,0000,0000,0000,,
Dialogue: 0,0:07:02.61,0:07:03.64,Default,,0000,0000,0000,,
Dialogue: 0,0:07:03.73,0:07:04.83,Default,,0000,0000,0000,,
Dialogue: 0,0:07:04.96,0:07:06.33,Default,,0000,0000,0000,,
Dialogue: 0,0:07:06.72,0:07:09.41,Default,,0000,0000,0000,,
Dialogue: 0,0:07:10.00,0:07:10.78,Default,,0000,0000,0000,,
Dialogue: 0,0:07:10.88,0:07:13.13,Default,,0000,0000,0000,,
Dialogue: 0,0:07:14.09,0:07:15.06,Default,,0000,0000,0000,,
Dialogue: 0,0:07:15.27,0:07:16.72,Default,,0000,0000,0000,,
Dialogue: 0,0:07:16.92,0:07:18.83,Default,,0000,0000,0000,,
Dialogue: 0,0:07:19.78,0:07:21.60,Default,,0000,0000,0000,,
Dialogue: 0,0:07:21.67,0:07:22.85,Default,,0000,0000,0000,,
Dialogue: 0,0:07:22.93,0:07:24.20,Default,,0000,0000,0000,,
Dialogue: 0,0:07:24.49,0:07:26.67,Default,,0000,0000,0000,,
Dialogue: 0,0:07:27.72,0:07:28.82,Default,,0000,0000,0000,,
Dialogue: 0,0:07:28.98,0:07:32.17,Default,,0000,0000,0000,,
Dialogue: 0,0:07:32.57,0:07:34.04,Default,,0000,0000,0000,,
Dialogue: 0,0:07:34.70,0:07:37.11,Default,,0000,0000,0000,,
Dialogue: 0,0:07:37.55,0:07:38.53,Default,,0000,0000,0000,,
Dialogue: 0,0:07:38.97,0:07:39.75,Default,,0000,0000,0000,,
Dialogue: 0,0:07:40.36,0:07:41.90,Default,,0000,0000,0000,,
Dialogue: 0,0:07:42.05,0:07:44.65,Default,,0000,0000,0000,,
Dialogue: 0,0:07:45.05,0:07:46.64,Default,,0000,0000,0000,,
Dialogue: 0,0:07:46.87,0:07:48.01,Default,,0000,0000,0000,,
Dialogue: 0,0:07:48.77,0:07:50.09,Default,,0000,0000,0000,,
Dialogue: 0,0:07:50.56,0:07:52.81,Default,,0000,0000,0000,,
Dialogue: 0,0:07:53.08,0:07:55.85,Default,,0000,0000,0000,,
Dialogue: 0,0:07:56.81,0:07:58.25,Default,,0000,0000,0000,,
Dialogue: 0,0:07:58.90,0:08:00.20,Default,,0000,0000,0000,,
Dialogue: 0,0:08:00.46,0:08:01.47,Default,,0000,0000,0000,,
Dialogue: 0,0:08:02.11,0:08:04.36,Default,,0000,0000,0000,,
Dialogue: 0,0:08:05.40,0:08:06.80,Default,,0000,0000,0000,,
Dialogue: 0,0:08:07.26,0:08:08.47,Default,,0000,0000,0000,,
Dialogue: 0,0:08:08.53,0:08:10.69,Default,,0000,0000,0000,,
Dialogue: 0,0:08:11.09,0:08:13.46,Default,,0000,0000,0000,,
Dialogue: 0,0:08:15.10,0:08:16.31,Default,,0000,0000,0000,,
Dialogue: 0,0:08:16.96,0:08:18.52,Default,,0000,0000,0000,,
Dialogue: 0,0:08:19.10,0:08:20.99,Default,,0000,0000,0000,,
Dialogue: 0,0:08:21.44,0:08:22.58,Default,,0000,0000,0000,,
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