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: I oppose the death penalty. Sentence 2: This is why I support the death penalty.

A: 1
****
Q: Sentence 1: A white cat standing on a carpet. Sentence 2: A sheep standing in a forest.

A: 0
****
Q: Sentence 1: You already did that - we have a Muslim in office right now. Sentence 2: -CryptoLutheran No. We have a Christian in office right now.

A:
1
****