Q: "A woman in a brown coat is reading a book." Does this mean that "A woman is reading a book."?
A: yes

Q: "A woman walks down a city sidewalk at night." Does this mean that "The woman is on her way to meet someone."?
A: it is not possible to tell

Q: "Two guys on guitar and one guy on the drums are performing in a band." Does this mean that "Two men are sleep in the woods."?
A: no

Q: "Two men playing ball, one white one black, with the black one leaping towards the right side of the frame." Does this mean that "Two men playing basketball outside."?
A:
it is not possible to tell