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Information extraction
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==Free or open source software and services== * [[General Architecture for Text Engineering]] (GATE) is bundled with a free Information Extraction system * Apache [[OpenNLP]] is a Java machine learning toolkit for natural language processing * [[ClearForest|OpenCalais]] is an automated information extraction web service from [[Thomson Reuters]] (Free limited version) * [[Mallet (software project)|Machine Learning for Language Toolkit (Mallet)]] is a Java-based package for a variety of natural language processing tasks, including information extraction. * [[DBpedia Spotlight]] is an open source tool in Java/Scala (and free web service) that can be used for named entity recognition and [[Name resolution (semantics and text extraction)|name resolution]]. * [[Natural Language Toolkit]] is a suite of libraries and programs for symbolic and statistical natural language processing (NLP) for the Python programming language * See also [[Conditional random field#Software|CRF implementation]]s
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