Q: "An accordion player accompanies a man and woman who are dancing a tango on a city street as several passersby watch." Does this mean that "two men play accordians alone"?
A: no

Q: "An elderly man sitting on a bench while reading a book." Does this mean that "An old man reading a book on a bench next to a duck pond."?
A: it is not possible to tell

Q: "A dark-skinned woman, wearing a pink top and brown and white skirt, is crossing the street." Does this mean that "There is a woman crossing the street to go shopping."?
A: it is not possible to tell

Q: "A man and a boy ride a four wheeled vehicle." Does this mean that "A father and son are riding a four wheeled vehicle."?
A:
it is not possible to tell