6997
The models were evaluated in two ways : by cross-validation against the corpus , and by asking users to rate the output .
 cross-validation, models
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:
 cross-validation, models