A man shaking the hand of a teenager sitting on a bench.
They are greeting each other outside.
Sitting on a bench does not imply sitting outside.
exists e1 e2 x1 x2 x3 x4 x5 x6.(n_hand(x3) & a_topic(x1) & Theme(e2,x3) & Actor(e2,x2) & v_shake(e2) & of(x3,x4) & on(e1,x6) & n_bench(x6) & Actor(e1,x5) & v_sit(e1) & (x4 = x5) & n_teenager(x4) & (x1 = x2) & n_man(x1))
exists x1 x3.(n_outside(x3) & n_thing(x1) & all x2.((-(x2 = x3) & n_outside(x2)) -> exists e1.(Theme(e1,x2) & Actor(e1,x1) & v_greet(e1))))