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From the Information Extraction Pipeline to Global Models, and Back

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Decisions in information extraction (IE), such as determining the types and relations of entities mentioned in text, depend on each other. To remain efficient, most systems make decisions in a sequential pipeline fashion, even if later decisions could help earlier ones. In this talk I will show how we used Conditional Random Fields to make these decisions jointly, substantially outperformed less global approaches and ranked first in several international IE competitions. I will then present relaxation methods we developed and applied to scale up (exact) inference in such models. In the final part of my talk I will argue why we should not dismiss the pipeline and present an exact beam-search algorithm, based on column generation, to overcome the pipeline’s greedy nature.

This talk is part of the Microsoft Research Machine Learning and Perception Seminars series.

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FW26, Computer Lab, 15 JJ Thomson Avenue, Cambridge -- Zoom: https://dtudk.zoom.us/j/63952790964 https://zoom.us/j/96498930455 Dirac Room, Fisher Buidling, St John's College

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