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.
Descriptive statistics of coreference annotations in the CRAFT corpus
| IDENTITY chains | 23,887 |
| APPOSITIVE | 4591 |
| Pronouns | 4145 |
| Mean IDENT chains per paper | 246.3 |
| Median IDENT chains per paper | 236 |
| Mean APPOS per paper | 47.3 |
| Median APPOS per paper | 43 |
| Mean length of IDENT chains | 4 |
| Median length of IDENT chains | 2 |
| Longest IDENT chain | 186 |
| Within-sentence IDENT chains | 1495 |
| Between-sentence IDENT chains | 22,392 |
