sentence_A: A dog, which is large and gray, is carrying a ball in its mouth and running across the grass
sentence_B: A large, gray ball is hitting a running dog, which is carrying some grass in its mouth
sentence_A_original: A large gray dog carrying a ball in its mouth runs across the grass towards the camera.
sentence_B_original: A large gray dog carrying a ball in its mouth runs across the grass towards the camera.