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Abstract Header

Predicting Knowledge Base Revisions from Realtime Text Streams

Konovalov, Alexander
http://orcid.org/0000-0002-5048-0298
http://rave.ohiolink.edu/etdc/view?acc_num=osu153200096922783

Abstract Details

2018, Master of Science, Ohio State University, Computer Science and Engineering.
Broad-coverage knowledge bases (KBs), such as Freebase, NELL, DBPedia, and Wikidata, Microsoft's Satori and Google's Knowledge Graph contain large collections of structured facts about things, people, places, and events happening in the world. These KBs have become increasingly important for a wide range of intelligent systems: from information retrieval and question answering, to Facebook's Graph Search, IBM's Watson, Google Home, and more. Previous work on learning to populate knowledge bases from text has, for the most part, made the simplifying assumption that facts remain constant over time. But this is inaccurate -- we live in a rapidly changing world. Knowledge should not be viewed as a static snapshot, but instead a rapidly evolving set of facts that must change as the world changes. In this thesis we demonstrate the feasibility of accurately identifying entity-transition-events from real-time news and social media text streams, that drive changes to a knowledge base. We use Wikipedia's revision history for distant supervision to learn event extractors, and evaluate the extractors based on their ability to predict online updates. Our weakly supervised event extractors are able to predict 10 KB revisions per month at 0.8 precision. By lowering our confidence threshold, we can suggest 34.3 correct edits per month at 0.4 precision. 64% of predicted edits were detected before they were added to Wikipedia. The average lead time of our forecasted knowledge revisions over Wikipedia's editors is 40 days, demonstrating the utility of our method for suggesting edits that can be quickly verified and added to the knowledge graph.
Alan Ritter (Advisor)
Wei Xu (Committee Member)
31 p.
Computer Engineering; Computer Science
knowledge bases; event extraction; social media; distant supervision; database revision history

Recommended Citations

Citations

  • Konovalov, A. (2018). Predicting Knowledge Base Revisions from Realtime Text Streams [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu153200096922783

    APA Style (7th edition)

  • Konovalov, Alexander. Predicting Knowledge Base Revisions from Realtime Text Streams. 2018. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu153200096922783.

    MLA Style (8th edition)

  • Konovalov, Alexander. "Predicting Knowledge Base Revisions from Realtime Text Streams." Master's thesis, Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu153200096922783

    Chicago Manual of Style (17th edition)

osu153200096922783
505
© 2018, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.