*
Counter
+
EventMention
RelationMention
Counter
Table
+=
BVFDataset
BVFRankingDataset
CounterDataset
Dataset
RVFDataset
RVFKRankingDataset
RVFRankingDataset
RankingDataset
Counter
-
EventMention
RelationMention
Counter
--
EventMention
RelationMention
-=
Counter
/
Counter
_children
NonTerminal
_parent
Tree