A man with a guitar is waving.
the man is outside on the sidewalk waving and holding a guitar
The man with the guitar is waving, but we can't determine where he is, or if he's outside on the sidewalk.
exists e1 x1 x2.(Actor(e1,x1) & v_wave(e1) & with(x1,x2) & n_guitar(x2) & n_man(x1))
exists e2 e1 s1 x1 x2 x3 x4.(n_sidewalk(x2) & n_man(x1) & for(s1,e2) & Theme(e2,x4) & Actor(e2,x1) & v_hold(e2) & n_guitar(x4) & for(s1,e1) & Theme(e1,x3) & Actor(e1,x1) & v_wave(e1) & n_guitar(x3) & on(s1,x2) & Theme(s1,x1) & a_outside(s1))