Q: "A man in a bright yellow shirt plays his guitar as another man plays the drums in the background." Does this mean that "Two people are performing music."?
A: yes

Q: "A girl swings on a nice day." Does this mean that "The swing is still."?
A: it is not possible to tell

Q: "A man with a green, star-shaped balloon is standing in front of a large building." Does this mean that "The man has a child."?
A: it is not possible to tell

Q: "A man holding himself with one arm i front of a store." Does this mean that "The man is in front of the bog."?
A:
no