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.

Example Input: Sentence 1: In the following centuries sand swept through the area burying many of the buildings. Sentence 2: Over time, sand swept through the region and buries the buildings.
Example Output: yes

Example Input: Sentence 1: At the very northern tip of the Sinai is Taba, with several large hotels, marking the Egyptian/Israeli border. Sentence 2: Taba's hotels are all very expensive, but have good room service.
Example Output: no

Example Input: Sentence 1: 4 billion is spent on medication and doctor visits . There is plenty of room for growth--only an estimated 12 percent of hay fever sufferers seek medical treatment. Sentence 2: Hay fever spending may rise if more of the 12% decide to seek medication and a visit to the doctor.
Example Output:
yes