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: In an attempt to counter a threat from the Saracen Muslims, a new potent religious force from the East, the Byzantine army forcefully enlisted the men of the islands. Sentence 2: The Saracen Muslims would have easily taken over Byzantium if not for the draft.

Ex Output:
no


Ex 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.

Ex Output:
yes


Ex Input:
Sentence 1: Wigand and Bergman are both insiders, and both, ultimately, whistle-blowers. Sentence 2: Wingand and Berg are outsiders. 

Ex Output:

yes