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Four problems render vector space model -LRB- VSM -RRB- - based text classification approach ineffective : 1 -RRB- Many words within song lyrics actually contribute little to sentiment ; 2 -RRB- Nouns and verbs used to express sentiment are ambiguous ; 3 -RRB- Negations and modifiers around the sentiment keywords make particular contributions to sentiment ; 4 -RRB- Song lyric is usually very short .
 conjunction: Negations, modifiers; used for: Negations, sentiment; used for: modifiers, sentiment
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
 Entity Pairs:  Negations, modifiers; Negations, sentiment; modifiers, sentiment 
Answer:
 conjunction: Negations, modifiers; used for: Negations, sentiment; used for: modifiers, sentiment