9989
We imposed a time limit on our experiment : the amount of time spent on the design of our constraint system was about the same as the time we used to train and test the easy-to-implement statistical model .
 constraint system, statistical model
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:
 constraint system, statistical model