Evaluate the similarity between them and classify them into classes from 0-5 as follows:
0 : The two sentences are completely dissimilar.
1 : The two sentences are not equivalent, but are on the same topic.
2 : The two sentences are not equivalent, but share some details.
3 : The two sentences are roughly equivalent, but some important information differs/missing.
4 : The two sentences are mostly equivalent, but some unimportant details differ.
5 : The two sentences are completely equivalent, as they mean the same thing.

Ex Input:
Sentence 1: He gave a surprisingly impassioned speech to the United Steelworkers of America, who announced their endorsement yesterday. Sentence 2: On Tuesday, he picked up the endorsement of the United Steelworkers of America.

Ex Output:
2


Ex Input:
Sentence 1: Japan's opposition party chief criticizes Abe's economic policies Sentence 2: Zimbabwe‚Äôs opposition MDC party challenges Robert Mugabe‚Äôs election win

Ex Output:
0


Ex Input:
Sentence 1: A young girl with a pink hat on with a yellow building in the background. Sentence 2: A young girl in a pink dress with something in her hand.

Ex Output:

2