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 U.S. government and private technology experts warned Wednesday that hackers plan to attack thousands of Web sites Sunday in a loosely co-ordinated " contest " that could disrupt Internet traffic ., Sentence2: THE US government and private technology experts have warned that hackers plan to attack thousands of websites on Sunday in a loosely co-ordinated " contest " that could disrupt Internet traffic .
[EX A]: Yes

[EX Q]: Sentence1: Based on having at least one of the symptoms , most students had been hung over between three and 11 times in the previous year ., Sentence2: On average the students suffered at least one of the 13 symptoms between three and 11 times in the last year .
[EX A]: Yes

[EX Q]: Sentence1: " He may not have been there , " the defence official said on Thursday ., Sentence2: " He may not have been there , " said a defence official speaking on condition of anonymity .
[EX A]:
Yes