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question
Answer
Type Prediction
Information
Retrieval
Query
expansion
Å u]58:‚CD\„(Kr=OE`=@?-I 583OcrELK4W
Å 10K9t^_C30–BC†LCDA‰=OE j K
Answer
Selection
Ranked
Answers
TREC
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583 j Z9K9\Ç=F74CˆtC } j Z43n:5” j 3nA j :‚b j K4CDKr=OtN5;t-tF7 j ^KµELK
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DOC
Database
Raw
Named
Text
Entity
Marked
Text
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45
base
ngr−only
pos
expcat
expcat−markqw
40
35
accuracy
30
25
20
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j } d s0a01]–B„Ó^74EGA67 EGt5nA58=OA67¬5;†T†%} j 3¡5;K9t^_C36tK j = j }
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10
5
0
100
200
300
400
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number of features
600
700
800
900
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retrieved passage
250 bytes
50 bytes
10\958: ì e&i CD3FWxC3ˆH#Ã]ETK9ACKr= ƒ C†L†G5 d ELC=O3O59Hœ5;K9\
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number of queries
70
60
50
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