The 'sentence' is not correct English because it's missing important punctuation marks. In fact, it's not a sentence. The definition of a sentence according to

The 'sentence' is not correct English because it's missing important punctuation marks. In fact, it's not a sentence. The definition of a sentence according to Google is: "a set of words that is complete in itself...". Without punctuation, it is incomplete; so it is not a sentence. Maybe it's a phrase? Adding punctuation makes it a sentence: Buffalo buffalo Buffalo buffalo buffalo, buffalo Buffalo buffalo. ... Buffalo buffalo which Buffalo buffalo buffalo, buffalo Buffalo buffalo. ... Buffalo bisons which Buffalo bisons bully, bully Buffalo bisons.