An AbstractEval which doesn't just evaluate all constituents, but
lets you provide a filter to only pay attention to constituents
formed from certain subtrees. For example, one provided filter
lets you limit the evaluation to subtrees which contain a
particular kind of node.
Nested Class Summary
Nested classes/interfaces inherited from class edu.stanford.nlp.parser.metrics.AbstractEval
Returns an eval which is good for counting the attachment of
specific node types. For example, suppose you want to count the
attachment of PP in an English parsing. You could create one
with PP as the child pattern, and then it would give you p/r/f1
for just nodes which have a PP as a child.