9946
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 .
 system, long-duration and complete occlusion; prior knowledge, shape; prior knowledge, motion of objects; shape, motion of objects
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
Answer:
 system, long-duration and complete occlusion; prior knowledge, shape; prior knowledge, motion of objects; shape, motion of objects