What was the earliest known civilization?
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Civilization is a facet of humanity.
One of the features of humanity is the appearance of a civilization .
What was the earliest known civilization?</s>Civilization is a facet of [unused1]humanity                [unused2] .
What was the earliest known civilization?</s>Civilization is a facet of humanity.
What was the earliest known civilization?</s>One of the features of [unused1]humanity                [unused2] is the appearance of a civilization .
What was the earliest known civilization?</s>One of the features of humanity is the appearance of a civilization .
What was the earliest known civilization?</s>civilization,0,civilization,civilization,facet of,[unused1]humanity[unused2],[unused1]humanity[unused2],0,civilization,[unused1]humanity[unused2],0,[unused1]humanity[unused2]
What was the earliest known civilization?</s>civilization,0,civilization,civilization,facet of,humanity,humanity,0,civilization,humanity,0,humanity