( , ). . .
. , , , , . , , , , U:
Weight(U):= Location(U) + CuePhrase(U) + StatTerm(U) + AddTerm(U)
(Location) , , , , , .
, , , . , ( ) ( ).
, (StatTerm). , , , . .
, , tf.idf, ( , ).
, , (AddTerm) , , . , , .
, , (Location, CuePhrase, StatTerm, AddTerm). , n , ( n ) .
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60 70- , , , .
, . ( ), , . , ( , ). , , . , . , , , , , . , . . . , , .