3258
Existing methods for supervised dimensionality reduction often presume that the data is densely sampled so that a neighborhood graph structure can be formed , or that the data arises from a known distribution .
 used for: Existing methods, supervised dimensionality reduction
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:  Existing methods, supervised dimensionality reduction 
Answer:
 used for: Existing methods, supervised dimensionality reduction