Q: "a walmart worker wearing a white coat." Does this mean that "The person is sleeping."?
A: no

Q: "A man in a white uniform rides a motocross bike down a forest trail." Does this mean that "A woman riding a motocross bike"?
A: no

Q: "A woman picks greens inside of a grocery store." Does this mean that "A woman picks greens for a salad inside of a grocery store."?
A: it is not possible to tell

Q: "A dog running through snow." Does this mean that "A big dog running through snow."?
A:
it is not possible to tell