With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: The effects last approximately 8–12 hours, but factor Xa activity does not return to normal within 24 hours, so once-daily dosing is possible.
text_B: The effects last approximately 8–13 hours, but factor Xa activity does not return to normal within 24 hours, so once-daily dosing is possible.
contradiction.