Q: "A woman on a cellphone walks up the steps of the underground with another passenger close behind." Does this mean that "a woman is talking on the cellphone after getting of the underground"?
A: yes

Q: "The basketball player holds the ball." Does this mean that "A basketball player is getting ready for a free-throw."?
A: it is not possible to tell

Q: "Woman in red standing before a massive sandstone wall." Does this mean that "A woman in blue is standing before a massive sandstone wall."?
A: no

Q: "A man preparing his net for fishing." Does this mean that "Two girls throw a Frisbee back and forth."?
A:
no