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A second , related theme is the use of speech and text-image recognition to retrieve arbitrary , user-specified information from documents with signal content .
 speech and text-image recognition, theme; documents with signal content, speech and text-image recognition
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:
 speech and text-image recognition, theme; documents with signal content, speech and text-image recognition