Q: "A football player wearing a number ten jersey is catching a football with both hands." Does this mean that "An athlete catches a football"?
A: yes

Q: "An overweight person sitting on a bench reading a magazine." Does this mean that "People are passing by a fat person sitting on a bench."?
A: it is not possible to tell

Q: "A young girl in a dress is looking at her reflection in a river bed." Does this mean that "A girl jumps into the river."?
A: no

Q: "The boy on the bike is wearing safety glasses and a helmet." Does this mean that "A boy goes without his training wheels on his bike for the first time."?
A:
it is not possible to tell