| A Composite Kernel to Extract Relations between Entities with Both Flat and Structured Features Recent countries visiting this post |  |
 | 6 | United States |
 | 1 | Japan |
 | 1 | China |
| A Composite Kernel to Extract Relations between Entities with Both Flat and Structured Features Recent countries visiting this post | |
| 6 | United States |
| 1 | Japan |
| 1 | China |