Rate the similarity of the following two sentences
World stocks rise on hopes for EU, US stimulus
Stocks rise on hopes for a Fed stimulus

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3

Rate the similarity of the following two sentences
Syrian Rebel Groups Battle Each Other in North
Syrian rebel groups battle each other in north

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5

Rate the similarity of the following two sentences
Prairie dogs sold as exotic pets are believed to have been infected in an Illinois pet shop by a Gambian giant rat imported from Africa.
Prairie dogs are believed to have become infected in a pet shop through a Gambian rat imported from Africa.

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4