Entity class to hold information about an entity extracted from a sentence.

Relationship class to hold information about a relationship extracted from a sentence.

A pattern is a set of tuples that is used to extract relationships between named-entities.

Configuration class

An implementation of: "Identifying Relations for Open Information Extraction" (Anthony Fader, Stephen Soderland, and Oren Etzioni) http

Holds information about a sentence extracted from a document.

Tuple class: see: http://www.ling.upenn.edu/courses/Fall_2007/ling001/penn_treebank_pos.html select everything except stopwords, ADJ and

Vector Space Model class # remove stop words and tokenize