Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 1 Billion Pages = 1 Million Dollars? Mining the Web to Play "Who Wants
  to be a Millionaire?"   We exploit the redundancy and volume of information on the web to build a
computerized player for the ABC TV game show 'Who Wants To Be A Millionaire?'
The player consists of a question-answering module and a decision-making
module. The question-answering module utilizes question transformation
techniques, natural language parsing, multiple information retrieval
algorithms, and multiple search engines; results are combined in the spirit of
ensemble learning using an adaptive weighting scheme. Empirically, the system
correctly answers about 75% of questions from the Millionaire CD-ROM, 3rd
edition - general-interest trivia questions often about popular culture and
common knowledge. The decision-making module chooses from allowable actions in
the game in order to maximize expected risk-adjusted winnings, where the
estimated probability of answering correctly is a function of past performance
and confidence in in correctly answering the current question. When given a six
question head start (i.e., when starting from the $2,000 level), we find that
the system performs about as well on average as humans starting at the
beginning. Our system demonstrates the potential of simple but well-chosen
techniques for mining answers from unstructured information such as the web.

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The categories of this paper are: astro-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: ao-sci
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The categories of this paper are: nlin
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The categories of this paper are: cond-mat
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: atom-ph
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The categories of this paper are: econ
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The categories of this paper are: hep-th
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The categories of this paper are: dg-ga
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The categories of this paper are: adap-org
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The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ex
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The categories of this paper are: nucl-th