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The recognition system will eventually be integrated with natural language processing to achieve spoken language understanding .
 recognition system, spoken language understanding; natural language processing, recognition system; natural language processing, spoken language understanding
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:
 recognition system, spoken language understanding; natural language processing, recognition system; natural language processing, spoken language understanding