Q: "A man doing a jump while waterskiing on a lake." Does this mean that "A man performs a stunt while waterskiing"?
A: yes

Q: "Four ladies walking through a hallway at an Art Museum." Does this mean that "Four friends are looking at art at the museum."?
A: it is not possible to tell

Q: "Four men in green, red, gray, and white shirts standing near a blue handrail smiling for a picture." Does this mean that "The men are sky diving."?
A: no

Q: "A woman with a blue scarf is reading a magazine in front of a painting of sunflowers." Does this mean that "The woman is sewing."?
A:
no