A teenager in a black sweatshirt sitting on the ground and listening to music.
A teenager is wearing giant headphones and listening to their iPod.
The teenager is just listening to music. There is no reason to believe he has giant headphones while he is doing it. There is also no reason to think anyone is listening to their iPod. They could be listening to any radio or someone else's device.
exists e1 s1 x1 x2 x3 x4 x5 x6 x7.(n_listening(x6) & n_ground(x5) & subset_of(x6,x4) & subset_of(x5,x4) & a_topic(x1) & in(x1,x2) & to(e1,x7) & n_music(x7) & on(e1,x4) & Actor(e1,x3) & v_sit(e1) & (x2 = x3) & n_sweatshirt(x2) & a_black(s1) & Theme(s1,x2) & n_teenager(x1))
exists e1 e2 s1 x1 x2 x3 x4.(to(e2,x4) & n_ipod(x4) & of(x4,x1) & n_thing(x1) & Actor(e2,x3) & v_listen(e2) & n_teenager(x3) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_headphone(x2) & a_giant(s1) & Theme(s1,x2) & n_teenager(x1))