Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
| Category | Features |
| Baseline features | Original |
| Capital Upper | |
| Upper | |
| Normalized form | |
| Prefix and Suffix | |
| Concept dictionary matching | |
| Concept type | |
| Stanford Parser POS | |
| Enju Parser POS | |
| Ontological features | 4 dictionaries matching (DF1) |
| Position matching(DF2) | |
| Coreference features | Coreference dictionary matching (CF) |
| World knowledge features | Wiki word matching (WF1) |
| Wiki word matching (WF2) | |
| Wiki word matching (WF3) | |
| Hierarchical feature | Hierarchical feature(HF) |
