Q: "Dog rolling in grass" Does this mean that "A dog is playing outside."?
A: it is not possible to tell

Q: "The man sits with his dog on a bench in a park." Does this mean that "A man is laying in the grass alone."?
A: no

Q: "A young boy runs barefoot while wearing a blue swimsuit." Does this mean that "The man with no shoes on is wearing a blue swimsuit."?
A: no

Q: "A hockey game where two players are going after the puck as a referee looks on." Does this mean that "The hockey players are playing with a puck."?
A:
yes