Q: "An african american man is playing a red electric guitar." Does this mean that "A man is playing a guitar."?
A: yes

Q: "A man in a neon vest works while smoking a cigarette." Does this mean that "The man lost his lighter and cant smoke.."?
A: no

Q: "A child runs with a football." Does this mean that "A sad child runs with a football."?
A: it is not possible to tell

Q: "A person jumping off of a high rock." Does this mean that "Someone jumped off a rock."?
A:
yes