A man shaking the hand of a teenager sitting on a bench.
A man is shaking the hand of his son for the first time.
Teenager does not imply son or that it is the first time the man has shook his hand.
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 e1 s1 x1 x2 x3 x4.(n_time(x4) & a_first(s1) & Theme(s1,x4) & n_son(x3) & of(x3,x2) & n_male(x2) & n_hand(x2) & for(e1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_shake(e1) & of(x2,x3) & n_man(x1))