1487
The use of BLEU at the character level eliminates the word segmentation problem : it makes it possible to directly compare commercial systems outputting unsegmented texts with , for instance , statistical MT systems which usually segment their outputs .
 used for: BLEU, character level; used for: BLEU, word segmentation problem; evaluate for: it, commercial systems; evaluate for: it, statistical MT systems; compare: commercial systems, statistical MT systems
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:  BLEU, character level; BLEU, word segmentation problem; it, commercial systems; it, statistical MT systems; commercial systems, statistical MT systems 
Answer:
 used for: BLEU, character level; used for: BLEU, word segmentation problem; evaluate for: it, commercial systems; evaluate for: it, statistical MT systems; compare: commercial systems, statistical MT systems