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: Citicorp could have agreed to market Travelers insurance or Salomon brokerage services, and vice versa, without actually becoming one company. Sentence 2: Citicorp had the opportunity to market the insurance companies without merging.
Example Output: yes

Example Input: Sentence 1: Below, we describe our efforts during on-site visits and in the competition process to achieve this goal. Sentence 2: Under this statement you shall find our efforts during on site visits.
Example Output: no

Example Input: Sentence 1: These expenditures include production incentives and investment tax credits for renewable energy, energy efficiency and transportation technologies. Sentence 2: the expenditures do not include production incentives and investment tax credits.
Example Output:
yes