Q: "A man in a black jacket is holding onto a boy with brown hair in a red jacket." Does this mean that "The boy is the man's nephew."?
A: it is not possible to tell

Q: "A small boy is playing in an open field." Does this mean that "The boy is outside"?
A: yes

Q: "A gray-haired man is fixing some pipes in the street with a big red machine that is spraying water." Does this mean that "The man is outside."?
A: yes

Q: "A young girl attempting to break open a pinata." Does this mean that "It is the girl's birthday."?
A:
it is not possible to tell