Two men shaking hands and smiling at the camera, while a third man stands behind them.
Two men sitting on a third man.
Two men would not normally be sitting on a third man.  One cannot be being sat on and standing at he same time.
exists e2 e1 p1 x1 x2 x3 x4 x5.(n_thing(x5) & n_camera(x5) & a_topic(x1) & exists e3 s1 x6.(behind(e3,x5) & Actor(e3,x6) & v_stand(e3) & n_man(x6) & a_third(s1) & Theme(s1,x6)) & while(e2,p1) & at(e2,x5) & Actor(e2,x4) & v_smile(e2) & (x1 = x4) & Theme(e1,x3) & Actor(e1,x2) & v_shake(e1) & n_hand(x3) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists e1 s1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_man(x3) & a_third(s1) & Theme(s1,x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_man(x1) & card_eq_2(x1))