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

Example Input: Sentence1: The technology-laced Nasdaq Composite Index < .IXIC > declined 16.68 points , or 1.01 percent , at 1,636.94 ., Sentence2: The broader Standard & Poor 's 500 Index .SPX eased 7.57 points , or 0.76 percent , at 990.94 .
Example Output: No

Example Input: Sentence1: Wall Street regained a positive track yesterday after two of Saddam Hussein 's sons were killed in a firefight in Iraq ., Sentence2: WALL St regained a positive track today following news that two of Saddam Hussein 's sons were among four Iraqis killed in a US raid in northern Iraq .
Example Output: Yes

Example Input: Sentence1: In September , a 27-year-old Singapore researcher contracted SARS while working in a laboratory ., Sentence2: In a case in August , a 27-year-old laboratory worker in Singapore developed SARS .
Example Output:
Yes