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: World economic leaders hailed signs of a global revival on Tuesday but agreed it had to be handled with care to prevent any setback ., Sentence2: DUBAI , SEPTEMBER 23 : The world economic leaders hailed on Tuesday signs of a global revival but agreed it had to be handled with care to prevent any setback .

SOLUTION: Yes

PROBLEM: Sentence1: " This blackout was largely preventable , " said Spencer Abraham , US energy secretary ., Sentence2: " This blackout was largely preventable , " Energy Secretary Spencer Abraham said at a press conference this afternoon .

SOLUTION: Yes

PROBLEM: Sentence1: " This blackout was largely preventable , " Energy Secretary Spencer Abraham said ., Sentence2: " Things go wrong , " U.S. Energy Secretary Spencer Abraham said Wednesday at the Department of Energy .

SOLUTION:
No