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Factor analysis and principal components analysis can be used to model linear relationships between observed variables and linearly map high-dimensional data to a lower-dimensional hidden space .
 conjunction: Factor analysis, principal components analysis; used for: Factor analysis, linear relationships between observed variables; used for: principal components analysis, linear relationships between observed variables
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:  Factor analysis, principal components analysis; Factor analysis, linear relationships between observed variables; principal components analysis, linear relationships between observed variables 
Answer:
 conjunction: Factor analysis, principal components analysis; used for: Factor analysis, linear relationships between observed variables; used for: principal components analysis, linear relationships between observed variables