Q: "A child in a red shirt rides a zip-line while a shirtless child waits on a platform." Does this mean that "A child waited for a turn on the zipline."?
A: yes

Q: "Many people in casual clothing are crossing a city intersection in both directions." Does this mean that "There are many people in the city."?
A: yes

Q: "A girl on someone's back is laughing." Does this mean that "A young female is laughing."?
A: yes

Q: "A man in a black hat standing next to a uncompleted structure." Does this mean that "There is an incomplete structure next to the person wearing a black hat."?
A:
yes