For easy reference with related work in the literature, evaluation is also done on 347 documents (including nwire and bnews domains) and 4305 relation instances using 5-fold cross-validation.
these relation instances are first divided into 5 sets, then, one of them (about 860 instances) is used as the test data set, while the others are regarded as the training data set, from which the initial seed set is sampled.