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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 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:  system, long-duration and complete occlusion; prior knowledge, shape; prior knowledge, motion of objects; shape, motion of objects 
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