Q: "People standing around on sand in the rain." Does this mean that "It is raining on the sand."?
A: yes

Q: "A man is helping a young boy learn to ride his tricycle." Does this mean that "The man teaching the boy is his father."?
A: it is not possible to tell

Q: "The woman is wearing a yellow coat and is walking down a city block that seems upset." Does this mean that "The woman is riding in a taxi."?
A: no

Q: "A man is carrying bananas on his head." Does this mean that "A man carries bananas on his head to the market."?
A:
it is not possible to tell