Q: "a woman wear a fancy dress and tiara on a beach" Does this mean that "A woman wearing a bathing suit is sitting in a bathtub."?
A: no

Q: "A boy drawing boxes on his notebook." Does this mean that "the boy typed on the laptop while on the plane"?
A: no

Q: "An elderly woman buying food from a market stand." Does this mean that "a woman buying food"?
A: yes

Q: "A female gymnast holds herself vertically above uneven bars." Does this mean that "A gymnast performing an action."?
A:
yes