In this task, you're given a pair of sentences, sentence 1 and sentence 2. Your job is to determine if the two sentences clearly agree/disagree with each other, or if this can't be determined. Indicate your answer as yes or no respectively.

[Q]: Sentence 1: For purposes of this exercise, there are at least seven categories of costs and four benefits that might be reviewed. Sentence 2: There are no more than six categories of costs to be reviewed for this exercise.
[A]: yes


[Q]: Sentence 1: If they say so, said the Astronomer, "I'm sure it will. Sentence 2: That must be the case.
[A]: yes


[Q]: Sentence 1: and it it was tough understanding understanding those folks Sentence 2: Understanding those people was difficult. 
[A]:
yes