Definition: You are given two sentences(Sentence1 and Sentence2). Answer "Yes" if these sentences are a paraphrase of one another, otherwise answer "No".
Input: Sentence1: It 's the first such drill since the September 11 terrorist attacks on New York and Washington ., Sentence2: It is the nation 's first large-scale counterterrorism exercise since the Sept . 11 terrorist attacks .
Output:
Yes