Table 6.

Contribution of features for the relation extraction model using a hold-out set of 176 documents

Features	Precision	Recall	F1
Entities between candidates	28.4	35.4	31.5
Candidate entities	42.7	72.8	53.9
Surface	74.6	66.2	70.2
Candidate entities + other entities between	81.6	90.4	85.8
All features	91.7	91.2	91.4