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: They stood again, tips to the sky and left hands out in salute. Sentence 2: They were waving their right hands. 
[A]: yes


[Q]: Sentence 1: Before 1966, we had a motley collection of teen magazines and fan club publications. Sentence 2: Before 1966 there were no magazines or publications.
[A]: yes


[Q]: Sentence 1: GAO produced a set of four guides to help organizations confront the problem. Sentence 2: The four guides produced by GAO caused the problem.
[A]:
yes