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The proposed algorithm is based on a statistical model of short-term log-energy sequences for echo-free speech .
 statistical model of short-term log-energy sequences, algorithm; statistical model of short-term log-energy sequences, echo-free speech
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
Answer:
 statistical model of short-term log-energy sequences, algorithm; statistical model of short-term log-energy sequences, echo-free speech