Q: "A football player in yellow jersey running with a ball." Does this mean that "The football player is a running back."?
A: it is not possible to tell

Q: "A young boy carrying a stool for a big event in his village." Does this mean that "A young boy sitting in the stool."?
A: no

Q: "A man in a short-sleeve shirt and pants jumping up in a water fountain." Does this mean that "A man is playing in the fountain."?
A: yes

Q: "Blond-haired woman and brown-haired man wrap an arm around each other." Does this mean that "Blond-haired woman and brown-haired man wrap an arm around each other under a Ferris wheel."?
A:
it is not possible to tell