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To address the sentence retrieval problem , we apply a stochastic , graph-based method for comparing the relative importance of the textual units , which was previously used successfully for generic summarization .
 stochastic , graph-based method, sentence retrieval problem; stochastic , graph-based method, generic summarization
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:
 stochastic , graph-based method, sentence retrieval problem; stochastic , graph-based method, generic summarization