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Two main classes of approaches have been studied to perform monocular nonrigid 3D reconstruction : Template-based methods and Non-rigid Structure from Motion techniques .
 approaches, monocular nonrigid 3D reconstruction; Template-based methods, approaches; Template-based methods, Non-rigid Structure from Motion techniques; Non-rigid Structure from Motion techniques, approaches
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:
 approaches, monocular nonrigid 3D reconstruction; Template-based methods, approaches; Template-based methods, Non-rigid Structure from Motion techniques; Non-rigid Structure from Motion techniques, approaches