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The objective is a generic system of tools , including a core English lexicon , grammar , and concept representations , for building natural language processing -LRB- NLP -RRB- systems for text understanding .
 used for: system, natural language processing -LRB- NLP -RRB- systems; part of: core English lexicon, system; part of: grammar, system; part of: concept representations, system; used for: natural language processing -LRB- NLP -RRB- systems, text understanding
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
Answer:
 used for: system, natural language processing -LRB- NLP -RRB- systems; part of: core English lexicon, system; part of: grammar, system; part of: concept representations, system; used for: natural language processing -LRB- NLP -RRB- systems, text understanding