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Table 7 Descriptive statistics of coreference annotations in the CRAFT corpus

From: Coreference annotation and resolution in the Colorado Richly Annotated Full Text (CRAFT) corpus of biomedical journal articles

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