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.

Q: 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

A: 0
****
Q: Sentence 1: Is Madeleine McCann Still Alive? Sentence 2: Reopen Madeleine case, police urge

A: 1
****
Q: Sentence 1: A group of people having a drink. Sentence 2: A row of locomotives on a siding in a field.

A:
0
****