Q: "a black great Dane running toward the camera in a backyard" Does this mean that "The dog is playing in his yard"?
A: yes

Q: "Two girls are dressed up and sitting on a bed laughing." Does this mean that "Two sad girls are dressed up and sitting on a bed laughing."?
A: it is not possible to tell

Q: "A man and two youngsters are standing in front of a Japanese vending machine." Does this mean that "An older woman trying to figure out how to work a vending machine"?
A: no

Q: "A man is jumping over a water fountain." Does this mean that "There is water in the fountain."?
A:
it is not possible to tell