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: The military officer barked at the recruits. Sentence 2: An officer is talking to recruits.
2

Sentence 1: A dog in in a car. Sentence 2: A dog is biting a mop.
1

Sentence 1: Median household income declined 1.1 percent between 2001 and 2002 to $42,409, after accounting for inflation. Sentence 2: The same survey found the median household income rose by $51, when accounting for inflation, to $43,057.

1