Her primary research areas are information extraction, semantic tagging and lexicon induction, coreference resolution, and subjectivity analysis. A major emphasis of her research has been automatically acquiring knowledge needed for natural language processing using bootstrapping methods that can learn from unannotated texts with minimal human supervision. Her professional roles have included service on the NAACL Executive Board, Human Language Technology (HLT) Advisory Board, DARPA/NSF Question Answering Roadmap Committee, Computational Linguistics Editorial Board, and as CoNLL Program Co-Chair and Faculty Advisor for the ACL Student Research Workshop.