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.

Sentence 1: Two cows standing in a large field. Sentence 2: Horse standing in a field.
2

Sentence 1: Two girls are sitting in front of a statue. Sentence 2: Two blonde girls are sitting next to a statue
4

Sentence 1: The question needs to be asked. Sentence 2: It is a question that needs to be answered.

3