This is a quote from the book "Animal Farm" by George Orwell
...igin was unknown, of marching every Sunday morning past a boar’s skull which was nailed to a post in the garden. This, too, would be suppressed, and the skull had already been buried. His visitors mig ht have observed, too, the green flag which flew from the masthead. If so, they would perhaps have noted that the white hoof and horn with which it had previously been marked had now been removed. It would be a plain green flag from now onwards.

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