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: lets assume we have % white and % black. Sentence 2: Imagine a place that's % white and % black.
4

Sentence 1: Two large dogs running in some grass. Sentence 2: Two brindle dogs running in the grass.
4

Sentence 1: A tiny blonde child in a blue dress sits on a table near her mother. Sentence 2: A young blonde girl wearing a helmet sits with a red bicycle behind her.

2