A man on rollerblades is doing a trick.
There is a man wearing rollerblades.
man on rollerblades means man wearing rollerblades
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_do(e1) & n_trick(x3) & on(x1,x2) & n_rollerblade(x2) & n_man(x1))
exists p1 x1 e1 x2 x3 x4.((x1 = x2) & Theme(e1,x4) & Actor(e1,x3) & v_wear(e1) & n_rollerblade(x4) & (x2 = x3) & n_man(x2))