A man waterskis while attached to a parachute.
A bulldozer knocks down a house
A man waterskis is not the same as a bulldozer knocks down.
exists s1 x1 x2 x3 x4.(a_topic(x1) & to(s1,x4) & n_parachute(x4) & Theme(s1,x3) & a_attach(s1) & (x1 = x3) & n_waterski(x1) & of(x1,x2) & n_man(x2))
exists e1 s1 x1 x2.(a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_knock(e1) & n_house(x2) & n_bulldozer(x1))