Definition
Information Extraction (IE) is a task of extracting pre-specified types of facts from written texts or speech transcripts, and converting them into structured representations (e.g., databases).
IE terminologies are explained via an example as follows.
Input Sentence:
Media tycoon Barry Diller on Wednesday quit as chief of Vivendi Universal Entertainment, the entertainment unit of French giant Vivendi Universal whose future appears up for grabs.
IE output:
Entities:
Person Entity: {Media tycoon, Barry Diller}
Organization Entity: {Vivendi Universal Entertainment, the entertainment unit}
Organization Entity: {French giant, Vivendi Universal}
“Part-Whole” relation:
{Vivendi Universal Entertainment, the entertainment unit} is part of {French giant, Vivendi Universal}.
“End-Position” event.
The above sentence includes a “Personnel_End-Position” event mention, with the trigger word which most clearly expresses the event occurrence, the position, the person who quit the position,...
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Ji, H. (2018). Information Extraction. In: Liu, L., Özsu, M.T. (eds) Encyclopedia of Database Systems. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-8265-9_204
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