tailieunhanh - Báo cáo khoa học: "Event Discovery in Social Media Feeds"

We present a novel method for record extraction from social streams such as Twitter. Unlike typical extraction setups, these environments are characterized by short, one sentence messages with heavily colloquial speech. To further complicate matters, individual messages may not express the full relation to be uncovered, as is often assumed in extraction tasks. | Event Discovery in Social Media Feeds Edward Benson Aria Haghighi and Regina Barzilay Computer Science and Artificial Intelligence Laboratory Massachusetts Institute of Technology eob aria42 regina @ Abstract We present a novel method for record extraction from social streams such as Twitter. Unlike typical extraction setups these environments are characterized by short one sentence messages with heavily colloquial speech. To further complicate matters individual messages may not express the full relation to be uncovered as is often assumed in extraction tasks. We develop a graphical model that addresses these problems by learning a latent set of records and a record-message alignment simultaneously the output of our model is a set of canonical records the values of which are consistent with aligned messages. We demonstrate that our approach is able to accurately induce event records from Twitter messages evaluated against events from a local city guide. Our method achieves significant error reduction over baseline 1 Introduction We propose a method for discovering event records from social media feeds such as Twitter. The task of extracting event properties has been well studied in the context of formal media . newswire but data sources such as Twitter pose new challenges. Social media messages are often short make heavy use of colloquial language and require situational context for interpretation see examples in Figure 1 . Not all properties of an event may be expressed in a single message and the mapping between messages and canonical event records is not obvious. 1Data and code available at http . rbg code twitter 389 TwUter Messages Seated at @carnegiehall waiting for @CraigyFerg s show to begin RT @leerader getting REALLY stoked for CraigyAtCarnegie sat night. Craig want to join us for dinner at the pub across the street 5pm be there @DJPaulyD absolutely killed it at Terminal 5 last night. @DJPaulyD DJ Pauly D .

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