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The differential spectral feature is directly estimated using a differential Gaussian mixture model -LRB- GMM -RRB- that is analytically derived from the traditional GMM used as a conversion model in the conventional SVC .
 used for: differential Gaussian mixture model -LRB- GMM -RRB-, differential spectral feature; used for: GMM, differential Gaussian mixture model -LRB- GMM -RRB-; used for: GMM, conversion model; used for: conversion model, SVC
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:  differential Gaussian mixture model -LRB- GMM -RRB-, differential spectral feature; GMM, differential Gaussian mixture model -LRB- GMM -RRB-; GMM, conversion model; conversion model, SVC 
Answer:
 used for: differential Gaussian mixture model -LRB- GMM -RRB-, differential spectral feature; used for: GMM, differential Gaussian mixture model -LRB- GMM -RRB-; used for: GMM, conversion model; used for: conversion model, SVC