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Number of news using different keywords.
| Type | Keywords | The number of news in CNN train period | The number of news in CNN test period | Total numbers |
|---|---|---|---|---|
| International news | Crude oil | 2408 | 4385 | 6793 |
| Domestic news | American oil | 622 | 839 | 1461 |
| American oil production | Not enough news | – | 885 |
