Q: "A brown dog runs towards the camera on a dirt trail with mountains in the background." Does this mean that "A dog is wagging a tail and running."?
A: it is not possible to tell

Q: "A man practices with a three section staff in front of a red curtain." Does this mean that "a man practices in front of the curtain"?
A: yes

Q: "A man on stage as people watch him and wave arms." Does this mean that "A man is performing for the audience"?
A: it is not possible to tell

Q: "A man with black hair is talking on a cellphone sitting in a cubicle." Does this mean that "The man is laying in a hammock."?
A:
no