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Hough voting in a geometric transformation space allows us to realize spatial verification , but remains sensitive to feature detection errors because of the inflexible quan-tization of single feature correspondences .
 used for: Hough voting, spatial verification; feature of: geometric transformation space, Hough voting
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:  Hough voting, spatial verification; geometric transformation space, Hough voting 
Answer:
 used for: Hough voting, spatial verification; feature of: geometric transformation space, Hough voting