With no explanation, label text_A→text_B with either "entailment" or "not-entailment".
text_A: I had been up very late studying for a test. "I went to class to take the test, feeling tired." My eyes were about to close as the teacher handed me the test. I decided to put my head on my desk and rest for a bit. I fell asleep without doing a single question on the test.
text_B: I started studying for the test very late. starts after I had been up very late studying for a test.
not-entailment.