Marco Pennacchiotti	Research Scientist Yahoo! Labs 701 First Avenue Sunnyvale, CA 94089
e-mail: marco.pennacchiotti_AT_gmail.com

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Short bio

I am a research scientist at Yahoo! Labs, since December 2008, where I do research on social media and text mining. I currently focus on extracting facts, entities and relation from Twitter; discovering authoritative users from Twitter mixing computational linguistics and social features; modeling user likes and behaviors in the social media; and finding ways to present to the user the best social content, by re-ranking and blending tweets with news articles, pictures, etc.

Before Yahoo!, I was an associate researcher at the Computational Linguistic Department of Saarland University (Germany), where I carried out research on lexical and frame semantics.

I received my PhD in Computer Science and Artificial Intelligence at the University of Rome "Tor Vergata" (ART group) in May 2007 with a dissertation on "Recognizing Textual Entailment: Methods and Resources", focusing on recognizing semantic relation among sentences (e.g. does ``Yahoo owns IntoNow'' entail ``IntoNow is a startup'' ?) and on information extraction. During this period I built with Patrick Pantel Espresso, a boostrapping relation extraction engine that was later adopted in several research centers.

I graduated in Computer Science Engineering in May 2003 with a thesis on Extraction and Classification of Verb Patterns.