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| 1 - All |
| "and"s are added between all words automatically. |
| 2 - Any |
| "or"s are added between all words automatically. |
| 3 - Boolean |
| You can use "and", "or", "not" and parenthesis between words to refine your search. Note that you cannot wirte "cat and not dog" or just "not dog" but you can write "cat not dog". |
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