Q: "Three young men wearing shorts or swimsuits are playing on a beach during a sunset" Does this mean that "The three young men in shorts are playing a game."?
A: yes

Q: "A young man in jean shorts is skateboarding." Does this mean that "A skateboarder is wearing jeans."?
A: yes

Q: "A girl is walking a horse across a paved suburban street." Does this mean that "A girl is running with the horse across a paved suburban street."?
A: no

Q: "A man is leaning over and pulling something out of a bag." Does this mean that "The man was getting lunch from the bag."?
A:
it is not possible to tell