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

Q: Sentence1: Bush is spending the weekend at his Crawford ranch , where he will play host to Italian Prime Minister Silvio Berlusconi ., Sentence2: He is to play host to Italian Prime Minister Silvio Berlusconi on Sunday and Monday .

A: No
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Q: Sentence1: " Accusations of improper activity are as false today as they were when the Democrats first made them , " Grella said ., Sentence2: Accusations of improper activity are as false today as when the Democrats first made them . "

A: Yes
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Q: Sentence1: The virus spreads when unsuspecting computer users open file attachments in emails that contain familiar headings like " Thank You ! " and " Re : Details " ., Sentence2: Sobig.F spreads when unsuspecting computer users open file attachments in e-mails that contain such familiar headings as " Thank You ! , " " Re : Details " or " Re : That Movie . "

A:
Yes
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