Q: "A young man in a subway walking." Does this mean that "A young man is in the subway."?
A: yes

Q: "This man is wearing a wetsuit and riding a surfboard." Does this mean that "A man blowing a bubble with gum."?
A: no

Q: "A man, woman, and two girls walk on the beach barefoot." Does this mean that "The group walks outside."?
A: yes

Q: "A man sells inflatable toys at an outdoor event." Does this mean that "The man is selling food."?
A:
no