... reason weintroduce a set of other structural features, associ-ated with patterns. For every occurrence of a pattern and for every word of this occurrence, we extract thefollowing features:pos, ... dependencies.The definition of a structure matching a pattern, and the algorithms for pattern matching and pat-tern extraction from a corpus are straightforward andsimilar to those described in (Johnson, 2002).The ... overcome these problems we de-veloped a similar approach using dependency struc-tures rather than phrase structure trees, which, more-over, extends bare pattern matching with machinelearning techniques....