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To implement the two speech enhancement systems based on real-time VC , one from NAM to a whispered voice and the other from electrolaryngeal speech to a natural voice , we propose several methods for reducing computational cost while preserving conversion accuracy .
 real-time VC, speech enhancement systems; one, speech enhancement systems; one, other; other, speech enhancement systems; computational cost, methods; computational cost, conversion accuracy; conversion accuracy, methods
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:
 real-time VC, speech enhancement systems; one, speech enhancement systems; one, other; other, speech enhancement systems; computational cost, methods; computational cost, conversion accuracy; conversion accuracy, methods