KeyPro (formerly called KX) is a tool for key-phrase extraction, which exploits basic linguistic annotations combined with simple statistical measures to select a list of weighted keywords from a text. In the example below, the sequence "Barack Obama" has been selected as the most relevant keyword.
Algorithm: Statistical measures.
Resources: List of keyword patterns, a reference corpus.
Evaluation benchmark: “Automatic Key-phrase Extraction from Scientific Articles” at SemEval 2010.