This is a quote from the book "Animal Farm" by George Orwell
.... It ended by their remaining there for a whole week, during which time the other animals saw nothing of them. Squealer was with them for the greater part of every day. He was, he said, teaching them to sing a new song, for which privacy was needed.

It was just after the sheep had returned, on a pleasant evening when the animals had finished work and were making their way back to the farm buildings, that the terrified neighing of a horse sound...

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