| Link-Based vs. Content-Based Retrieval for Question Answering Using Wikipedia Recent countries visiting this post |  |
 | 5 | United States |
 | 1 | Russian Federation |
 | 1 |
| Link-Based vs. Content-Based Retrieval for Question Answering Using Wikipedia Recent countries visiting this post | |
| 5 | United States |
| 1 | Russian Federation |
| 1 |