1605
We prove that while IBM Models 1-2 are conceptually and computationally simple , computations involving the higher -LRB- and more useful -RRB- models are hard .
 compare: IBM Models 1-2, models
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
 Entity Pairs:  IBM Models 1-2, models 
Answer:
 compare: IBM Models 1-2, models