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In contrast , we detect and describe 2D features in a nonlinear scale space by means of nonlinear diffusion filtering .
 feature of: nonlinear scale space, 2D features; used for: nonlinear diffusion filtering, 2D features
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
Answer:
 feature of: nonlinear scale space, 2D features; used for: nonlinear diffusion filtering, 2D features