Teacher: In this task, given 2 input sentences, you must classify the relation between them. If the second sentence has a similar meaning to that of the first sentence then the output is ' B_entails_A', if the second sentence has the opposite meaning to the first sentence then it is classified as ' B_contradicts_A'. If you cannot clearly ascertain agreement/disagreement between the two sentences, the label is ' B_neutral_A'.
Teacher: Now, understand the problem? If you are still confused, see the following example:
sentence_A: man is wearing a hard hat and dancing. sentence_B: There is no man with a hard hat dancing.
Solution: B_contradicts_A
Reason: The sentence B has opposite meaning as sentence_B says, "No man with a hat", but sentence_A says, "A man is wearing a hat", so B is contradicting A.

Now, solve this instance: sentence_A: A man is jumping a wall. sentence_B: A man is standing in front of a wall
Student:
B_contradicts_A