With no explanation, label text_A→text_B with either "strengthener" or "weakener".
text_A: A line of horses walks on a road as a car sits to the side with the hood and trunk open. An Amish family in a carriage pass by a car who is broken down.
text_B: The man tells the driver he will send help when he reaches town and as he smacks the horses with the reigns to speed them up his wife and children brace for the jolt.
strengthener.