Q: "A bearded man wearing a bandanna is pointing his finger whilst riding a bicycle." Does this mean that "A human pointing."?
A: yes

Q: "A young boy is beginning to shoot a basketball as a crowd watches the basketball court." Does this mean that "A young boy is playing hockey in an empty stadium."?
A: no

Q: "A man wearing a hat with blond dreadlocks holds juggling pins under a blue sky." Does this mean that "A man is about to put on an impressive juggling display."?
A: it is not possible to tell

Q: "A woman dressed in purple gets ready to ski down the mountain." Does this mean that "The woman is on a snowboard"?
A:
no