Q: "In front of a city bus, a woman photographs herself while carrying a plastic garbage bag." Does this mean that "A woman is photographing herself so she can post it on Facebook later."?
A: it is not possible to tell

Q: "Two workers in neon green shirts opening a utility box." Does this mean that "Two workers are opening a utility box."?
A: yes

Q: "Three asian men are sitting on a subway train." Does this mean that "The three men are going somewhere."?
A: yes

Q: "A woman with an orange shirt is walking past a 1 hour photo shop." Does this mean that "The lady is thinking about getting some photos developed at the store she is walking near."?
A:
it is not possible to tell