Prepositional Phrase Attachment: data files

The files have one of two extensions:

• .feat files: examples files in the SNoW format.

  Each line is a .feat file is an Example:. A list of active features, separated by a , and ends with a :. The class label is considered one of the features. It takes values 0 -- k-1, (where k is the number possible labels, the size of the confusion set). The rest of the features are indexed with numbers above k. The feature indices are sorted and therefore the class label appears as the first in this list.

• .occs files: the corresponding raw sentences.

The prefix indicate which are the test files and which are the training files.

  train.lema.occs
  train.lema.feat
 

  test.lema.occs
  test.lema.feat

In addition, the files pp.v.out and pp.n.out consists of complete parse trees of the sentences, along with the the 4 tuples extracted from them. The .v and .n files contain the v and n labeled examples, , respectively.