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Understanding natural images has been extensively studied in computer vision , while diagram understanding has received little attention .
 part of: Understanding natural images, computer vision; compare: Understanding natural images, diagram understanding
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:  Understanding natural images, computer vision; Understanding natural images, diagram understanding 
Answer:
 part of: Understanding natural images, computer vision; compare: Understanding natural images, diagram understanding