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While previous approaches relied on geometric , appearance , or correlation-based information for establishing correspondences between static cameras , they each have well-known limitations and are not extendable to wide-area settings with PTZ cameras .
 used for: geometric , appearance , or correlation-based information, approaches
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
Answer:
 used for: geometric , appearance , or correlation-based information, approaches