Two young men play a game of ping-pong.
Two men hold hands while strolling in the park.
Men do not have to be young.  If men play a game they are not strolling in the park.
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & of(x2,x3) & n_ping-pong(x3) & n_game(x2) & n_man(x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 e2 x1 x2 x3.(n_park(x3) & while(e1,e2) & in(e2,x3) & Actor(e2,x1) & v_stroll(e2) & Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_hand(x2) & n_man(x1) & card_eq_2(x1))