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: Waves are additive. Sentence 2: Waves are not additive.

Ex Output:
yes

Ex Input:
Sentence 1: Drew commented on that, and Nye answered: "Old Man knows what's he's doin'. Sentence 2: Nye responded, "Old Man is totally in the dark here.

Ex Output:
yes

Ex Input:
Sentence 1: De Wit was paid a reasonable stipend of a120 per year to produce the works, examples of which can also be seen in other rooms of the palace. Sentence 2: For each piece created, De Wit earned a20.

Ex Output:
yes