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While this task has much in common with paraphrases acquisition which aims to discover semantic equivalence between verbs , the main challenge of entailment acquisition is to capture asymmetric , or directional , relations .
 task, paraphrases acquisition; paraphrases acquisition, semantic equivalence; entailment acquisition, asymmetric , or directional , relations
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:
 task, paraphrases acquisition; paraphrases acquisition, semantic equivalence; entailment acquisition, asymmetric , or directional , relations