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: Man arrested over double murder Sentence 2: WA man arrested in police drug raid
1

Sentence 1: A man stands astride a bike on a rocky trail by a lake. Sentence 2: A woman is wearing a white headband, purple tank top and black gloves.
0

Sentence 1: Obama lauds progress on gay rights in inaugural address Sentence 2: Thousands protest gay marriage in France

1