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: Kids play soccer on a field. Sentence 2: Three boys playing soccer in a field
4

Sentence 1: A woman is riding on a horse. Sentence 2: A woman is picking tomatoes.
0

Sentence 1: No Thatcherite can ever call themselves a libertarian. Sentence 2: Ergo it offends me when Thatcherites call themselves libertarian.

2