Q: "A man on the beach is taking a picture of another man." Does this mean that "A person is taking a picture of another person."?
A: yes

Q: "A person in a shirt and rolled up jeans is running on a road through a forest." Does this mean that "a person wearing clothes running"?
A: yes

Q: "A man with a blue hat with a headlamp on it is standing in a cave." Does this mean that "A man is caving with a friend"?
A: it is not possible to tell

Q: "Several people walk along a waterway including a boy with a scooter." Does this mean that "No one walks along the waterway."?
A:
no