TASK DEFINITION: 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.
PROBLEM: Sentence 1: Train in a station. Sentence 2: Trains inside an indoor station.

SOLUTION: 4

PROBLEM: Sentence 1: The brown and white dog is walking in shallow waters. Sentence 2: A white and brown dog appears to be walking on the water.

SOLUTION: 5

PROBLEM: Sentence 1: A smiling woman holding a small baby. Sentence 2: a woman sitting on a sofa holding a baby.

SOLUTION:
3