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

SOLUTION: Yes

PROBLEM: Sentence1: About 1,000 people attended the ceremony , kicking off two days of observances tied to the March on Washington ., Sentence2: About 1,000 people came in stifling heat to begin two days of observances tied to the coming 40th anniversary of the March on Washington on Aug. 28 , 1963 .

SOLUTION: Yes

PROBLEM: Sentence1: France , Russia , China and others had advocated a stronger U.N. role to give a U.S.-chosen Iraqi authority international legitimacy ., Sentence2: France , Russia , China and even staunch ally Britain had advocated a stronger U.N. role , which they said was needed to give a U.S.-backed Iraqi authority international legitimacy .

SOLUTION:
Yes