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Although non-linear extensions of active shape models have been proposed and application specific solutions have been used , they still need a certain amount of user interaction during model building .
 user interaction, non-linear extensions of active shape models
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:
 user interaction, non-linear extensions of active shape models