| The Pronto QA System at TREC 2007: Harvesting Hyponyms, Using Nominalisation Patterns, and Computing Answer Cardinality Recent countries visiting this post |  |
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| The Pronto QA System at TREC 2007: Harvesting Hyponyms, Using Nominalisation Patterns, and Computing Answer Cardinality Recent countries visiting this post | |
| 3 | United States |
| 1 |