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The model is designed for use in error correction , with a focus on post-processing the output of black-box OCR systems in order to make it more useful for NLP tasks .
 model, error correction; model, post-processing; post-processing, error correction; it, NLP tasks
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:
 model, error correction; model, post-processing; post-processing, error correction; it, NLP tasks