A teenage girl walks past another with a cellphone.
The girl on her phone is talking to the other girl's boyfriend.
Because a girl walk past another teenager on phone does not mean he is talking to the other girl's boyfriend.
exists e1 s1 x1 x2 x3 x4.(for(e1,s1) & Theme(s1,x1) & a_past(s1) & Theme(e1,x3) & Actor(e1,x1) & v_walk(e1) & with(x3,x4) & n_cellphone(x4) & n_thing(x3) & n_girl(x1) & of(x1,x2) & n_teenage(x2))
exists e1 x1 x2 x3.(n_boyfriend(x3) & of(x3,x1) & -(x1 = x1) & n_girl(x1) & n_girl(x1) & n_phone(x2) & of(x2,x1) & n_female(x1) & to(e1,x3) & Actor(e1,x1) & v_talk(e1) & on(x1,x2))