Definition: 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.
Input: Sentence 1: Operation and maintenance expenditures had become by fiscal year 1990 the single largest individual program item in the Corps' budget. Sentence 2: Operational and maintenance costs have always been an insignificant expense.
Output:
yes