5101
We first apply approaches that have been proposed for predicting top-level topic shifts to the problem of identifying subtopic boundaries .
 approaches, predicting top-level topic shifts; approaches, identifying subtopic boundaries; predicting top-level topic shifts, identifying subtopic boundaries
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:
 approaches, predicting top-level topic shifts; approaches, identifying subtopic boundaries; predicting top-level topic shifts, identifying subtopic boundaries