Question-Answering via the Web: the AskMSR System Note: these viewgraphs were originally developed by Professor Nick Kushmerick, University College Dublin, Ireland. These copies are intended only for use for review in ICS 278. Question-Answering.
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Question-Answering via the Web: the AskMSR SystemNote: these viewgraphs were originally developed by Professor Nick Kushmerick, University College Dublin, Ireland. These copies are intended only for use for review in ICS 278.
In Proceedings of SIGIR'02
Adapted from: COMP-4016 ~ Computer Science Department ~ University College Dublin ~ www.cs.ucd.ie/staff/nick ~ © Nicholas Kushmerick 2002
a. Category-specific transformation rules
eg “For Where questions, move ‘is’ to all possible locations”
“Where is the Louvre Museum located”
“is the Louvre Museum located”
“the is Louvre Museum located”
“the Louvre is Museum located”
“the Louvre Museum is located”
“the Louvre Museum located is”
(Paper does not give full details!)
b. Expected answer “Datatype” (eg, Date, Person, Location, …)
When was the French Revolution? DATE
Nonsense,but whocares? It’s
only a fewmore queriesto Google.
Where is the Louvre Museum located?
Weight 5if we get a match, it’s probably right
Lots of non-answerscould come back too
+“the Louvre Museum is located”
+Louvre +Museum +located
merged, discardold n-grams
Mr Charles Dickens
tile highest-scoring n-gram
Repeat, until no more overlap