. 2017 Aug 17;18:372. doi: 10.1186/s12859-017-1775-9

Table 6.

Descriptive statistics of the i2b2 clinical coreference corpus [75, 76]

Markables	7214
Average markables per report	40.08
Pairs	5992
Average pairs per report	33.29
Identity chains	1304
Average identity chains per report	7.24

Adapted from [76]