In fact , most of the features3 implemented in existing coreference resolution systems rely solely on mention heads ( Bengtson and Roth , 2008 ) .
understanding the value of features for coreference resolution
E Bengtson D Roth
In both cases , the mention heads are sufficient to support the decisions : '' they '' refers to '' companies '' , and '' They '' refers to '' manufacturers '' . In fact , most of the features3 implemented in existing coreference resolution systems rely solely on mention heads ( Bengtson and Roth , 2008 ) . Furthermore , consider the possible mention candidate `` league '' ( italic in the text ) .
In fact , most of the features3 implemented in existing coreference resolution systems rely solely on mention heads ( @@CITATION ) .