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: A man holds on to a handle in the water. Sentence 2: A man is holding onto handles in the air.

A: 3
****
Q: Sentence 1: X'mas cruise passengers hit by Norovirus Sentence 2: Missing cruise passenger is a NSW ambo

A: 0
****
Q: Sentence 1: A boy waves around a sparkler. Sentence 2: A young boy is twisting a sparkler around in the air.

A:
4
****