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We present an efficient algorithm for chart-based phrase structure parsing of natural language that is tailored to the problem of extracting specific information from unrestricted texts where many of the words are unknown and much of the text is irrelevant to the task .
 used for: algorithm, chart-based phrase structure parsing; used for: natural language, chart-based phrase structure parsing
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
 Entity Pairs:  algorithm, chart-based phrase structure parsing; natural language, chart-based phrase structure parsing 
Answer:
 used for: algorithm, chart-based phrase structure parsing; used for: natural language, chart-based phrase structure parsing