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: A man is playing keyboards. Sentence 2: A man is riding a mechanical bull.

A: 1
****
Q: Sentence 1: The men are playing cricket. Sentence 2: The men are playing basketball.

A: 2
****
Q: Sentence 1: Staff writers Selwyn Crawford and Colleen McCain Nelson and Brian Anderson of DallasNews.com contributed to this report. Sentence 2: Staff writers Brandon Formby and Colleen McCain Nelson contributed to this report.

A:
3
****