Q: "A young woman is doing push ups in front of three members of the armed forces at a conference event." Does this mean that "A young woman and three other memebers of armed forces are at a conference."?
A: yes

Q: "The basketball player in white is dribbling the ball towards the player in black." Does this mean that "The athletes are playing basketball."?
A: yes

Q: "Three football players in navy blue and yellow uniforms are running down a football field; one is kicking a football as he runs." Does this mean that "Some people are in a locker room."?
A: no

Q: "Two hockey players stand and compete for the puck while a goalie crouches in front of the net." Does this mean that "some people playing hockey"?
A:
yes