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Information extraction (IE) involves several methods, including named entity recognition (NER), which identifies and classifies key entities in text; relation extraction, which uncovers relationships between entities; and event extraction, which identifies and categorizes specific events mentioned in the text. Techniques may also include keyword extraction and semantic role labeling. These methods often utilize natural language processing (NLP) algorithms and machine learning models to automate the extraction of structured information from unstructured data.

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