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: Kempenaers said some species are still faithful , notably swans and sea birds such as the albatross , which mate for life and are never unfaithful to their partners ., Sentence2: Kempenaers said fidelity still exists in some species , notably swans and sea birds such as the albatross that mate for life and are never unfaithful to their partners .

SOLUTION: Yes

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: In addition , it offered the United States and Israel a way to work around Mr. Arafat ., Sentence2: When the prime minister 's position was established in the spring , it offered the United States and Israel a way to work around Arafat .

SOLUTION:
No