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A unique characteristic of the system is its ability to cope with long-duration and complete occlusion without a prior knowledge about the shape or motion of objects .
 used for: system, long-duration and complete occlusion; feature of: prior knowledge, shape; feature of: prior knowledge, motion of objects; conjunction: shape, motion of objects
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: system, long-duration and complete occlusion; feature of: prior knowledge, shape; feature of: prior knowledge, motion of objects; conjunction: shape, motion of objects