You will be given a definition of a task first, then some input of the task.
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.

Sentence 1: In May, Vajpayee announced the successful completion of nuclear tests, which, although touted by the Indians as a sign of their sovereignty, may complicate India's relations with its neighbors and the West. Sentence 2: India has never completed any successful nuclear tests.
Output:
yes