%0 Book Section %1 Echihabi:2004 %A Echihabi, Abdessamad %A Hermjakob, Ulf %A Hovy, Eduard %A Marcu, Daniel %A Melz, Eric %A Ravichandran, Deepak %B Advances in Textual Question Answering %D 2004 %E Strzalkowski, Tomek %E Harabagiu, Sanda %I Kluwer %K answer_extraction %T How to Select an Answer String? %U http://www.isi.edu/~marcu/papers.html %X Given a question Q and a sentence/paragraph SP that is likely to contain the answer to Q, an answer selection module is supposed to select the ``exact'' answer sub-string A $\subset$ SP. We study three distinct approaches to solving this problem: one approach uses algorithms that rely on rich knowledge bases and sophisticated syntactic/semantic processing; one approach uses patterns that are learned in an unsupervised manner from the web, using computational biology-inspired alignment algorithms; and one approach uses statistical noisy-channel algorithms similar to those used in machine translation. We assess the strengths and weaknesses of these three approaches and show how they can be combined using a maximum entropy-based framework.

@incollection{Echihabi:2004, abstract = {Given a question Q and a sentence/paragraph SP that is likely to contain the answer to Q, an answer selection module is supposed to select the ``exact'' answer sub-string A $\subset$ SP. We study three distinct approaches to solving this problem: one approach uses algorithms that rely on rich knowledge bases and sophisticated syntactic/semantic processing; one approach uses patterns that are learned in an unsupervised manner from the web, using computational biology-inspired alignment algorithms; and one approach uses statistical noisy-channel algorithms similar to those used in machine translation. We assess the strengths and weaknesses of these three approaches and show how they can be combined using a maximum entropy-based framework.}, added-at = {2007-12-14T02:38:27.000+0100}, author = {Echihabi, Abdessamad and Hermjakob, Ulf and Hovy, Eduard and Marcu, Daniel and Melz, Eric and Ravichandran, Deepak}, biburl = {https://www.bibsonomy.org/bibtex/2380b4b132d8f3219a5a9c6a471dadc14/diego_ma}, booktitle = {Advances in Textual Question Answering}, editor = {Strzalkowski, Tomek and Harabagiu, Sanda}, interhash = {357637401d8b20434d895c170126c737}, intrahash = {380b4b132d8f3219a5a9c6a471dadc14}, keywords = {answer_extraction}, publisher = {Kluwer}, timestamp = {2007-12-14T02:38:28.000+0100}, title = {How to Select an Answer String?}, url = {http://www.isi.edu/~marcu/papers.html}, year = 2004 }