qa.4 - Natural Language Processing Natural Language Processing Question Answering Single Document Question Answering Grand Challenge Problem for NLP A

qa.4 - Natural Language Processing Natural Language...

This preview shows page 1 - 2 out of 7 pages.

Natural Language Processing 1 Question Answering Grand Challenge Problem for NLP: A program that can find the answer to arbitrary questions from text resources. WWW, encyclopedias, books, manuals, medical literature, scientific papers, etc. Another application: database queries Converting natural language questions into database queries was one of the earliest NLP applications! A scientific reason to do Q/A: the ability to answer questions about a story is the hallmark of text understanding. Natural Language Processing 2 Single Document Question Answering A single document Q/A task involves questions associated with one particular document. We usually assume that the answer appears somewhere in the document, but often it only appears once. Applications are for searching a particular source, such as a book, encyclopedia, technical manual, or speech. The questions and answers are often specific to the document. For example, “Where does Mary live?” or “What did Obama propose?” Natural Language Processing 3 Reading Comprehension Tests Reading comprehension tests were designed to evaluate how well a child understands a story. So they are an objective way to assess the “reading level” of NLP systems! Found data: questions and answer keys already exist! We can challenge our NLP systems with progressively harder questions (higher grade levels). Grade school exams typically ask factoid questions that mimic real-world applications (as opposed to advanced exams that often require summarization, e.g. “What is the topic of this article?”). Natural Language Processing 4 Sample Reading Comprehension Test Mars Polar Lander - Where Are You? (January 18, 2000) After more than a month of searching for a signal from NASA’s Mars Polar Lander, mission controllers have lost hope of finding it. The Mars Polar Lander was on a mission to Mars to study its atmosphere and search for water, something that could help scientists determine whether life ever existed on Mars. Polar Lander was to have touched down December 3 for a 90-day mission. It was to land near Mars’ south pole. The lander was last heard from minutes before beginning its descent. The last effort to communicate with the three-legged lander ended with frustration at 8 a.m. Monday. “We didn’t see anything,” said Richard Cook, the spacecraft’s project manager at NASA’s Jet Propulsion Laboratory. The failed mission to the Red Planet cost the American government more than $200 million dollars. Now, space agency scientists and engineers will try to find out what could have gone wrong. They do not want to make the same mistakes in the next mission.
Image of page 1
Image of page 2

You've reached the end of your free preview.

Want to read all 7 pages?

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes
A+ icon
Ask Expert Tutors