Term Extraction Documentation for Yahoo! Search. As an example Yahoo extracts "italian sculptors,virgin mary,painters,renaissance,inspiration" from "Italian sculptors and painters of the renaissance favored the Virgin Mary for inspiration".
DBpedia Spotlight annotates mentions of DBpedia resources in text, linking unstructured information sources to the Linked Open Data cloud through DBpedia. DBpedia Spotlight performs named entity extraction, including entity detection and Name Resolution (a.k.a. disambiguation).
LingPipe processes text using computational linguistics. Capabilities include:
Finding the names of people, organizations or locations in the news.
Automatically classifying Twitter search results into categories.