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We view coherence assessment as a ranking learning problem and show that the proposed discourse representation supports the effective learning of a ranking function .
 ranking learning problem, coherence assessment; discourse representation, ranking function
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:
 ranking learning problem, coherence assessment; discourse representation, ranking function