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.

Ex Input:
Sentence 1: I am sorry for that, he said.  Sentence 2: I do not apologize for anything, he stated.

Ex Output:
yes


Ex Input:
Sentence 1: There was an enormous sphere of thin crystal to represent the sky. Sentence 2: The crystal is very expensive and precious.

Ex Output:
no


Ex Input:
Sentence 1: By sign language? Sentence 2: Via sign language?

Ex Output:

yes