Q: "Two men are singing and playing guitars outside a cement structure with spectators sitting on steps on their left." Does this mean that "Nobody is singing."?
A: no

Q: "A shirtless African American wearing black pants is jogging along side a lake." Does this mean that "The person is outside."?
A: yes

Q: "A tour group is standing on the grass with ruins in the background." Does this mean that "There are ruins behind a group of people."?
A: yes

Q: "A woman riding a horse is chasing a cow." Does this mean that "A cow running away from a horse"?
A:
it is not possible to tell