You are given two sentences(Sentence1 and Sentence2). Answer "Yes" if these sentences are a paraphrase of one another, otherwise answer "No".

[EX Q]: Sentence1: The two have no diplomatic ties and their already tense relationship has been frayed by the crisis over the North 's nuclear ambitions ., Sentence2: The two have no diplomatic ties and their already tense relationship has been frayed further by a diplomatic spat over North Korea 's nuclear ambitions .
[EX A]: Yes

[EX Q]: Sentence1: The market remains pinned in a narrow range after a powerful rally drove the broad Standard & Poor 's 500 index .SPX up more than 20 percent since mid-March ., Sentence2: The market remains pinned in a narrow range after a powerful rally pushed the broad S & P 500 index up more than 20 percent since mid-March .
[EX A]: Yes

[EX Q]: Sentence1: " I don 't think my brain is going to go dead this afternoon or next week , " he said ., Sentence2: In a conference call yesterday , he said , " I don 't think that my brain is going to go dead this afternoon or next week . "
[EX A]:
Yes