Q: "A woman in a blue top is sitting on a bus." Does this mean that "A woman going to work."?
A: it is not possible to tell

Q: "Two guys talking about chairs." Does this mean that "two guys are sleeping"?
A: no

Q: "A man in a gray suit holds an umbrella on a street corner." Does this mean that "A man holds an umbrella."?
A: yes

Q: "The brown dog is running towards a blue and yellow tube." Does this mean that "A cat is running."?
A:
no