| Predicting Query Performance via Classification Recent countries visiting this post |  |
 | 8 | United States |
 | 1 | Germany |
 | 1 | France |
 | 1 | |
 | 1 | South Africa |
| Predicting Query Performance via Classification Recent countries visiting this post | |
| 8 | United States |
| 1 | Germany |
| 1 | France |
| 1 | |
| 1 | South Africa |