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: Fiscal Policy, Population Aging, and National Saving, Journal of Economic Perspectives    Sentence 2: Fiscal policy is directly related to population aging.

Ex Output:
no


Ex Input:
Sentence 1: Waves are additive. Sentence 2: Waves are not additive.

Ex Output:
yes


Ex Input:
Sentence 1: The woman was dark skinned and carried a short spear. Sentence 2: She walked with pride, holding her spear in one hand.

Ex Output:

no