A boy grinds a ledge on his skateboard.
A boy grinds a ledge on his skateboard and falls.
It does not imply that the boy falls since he grinds a ledge on his board.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_grind(e1) & on(x2,x3) & n_skateboard(x3) & of(x3,x1) & n_male(x1) & n_ledge(x2) & n_boy(x1))
exists e1 x1 x2 x3 x4 x5.(Theme(e1,x2) & Actor(e1,x1) & v_grind(e1) & on(x2,x3) & subset_of(x5,x3) & n_fall(x5) & subset_of(x4,x3) & n_skateboard(x4) & of(x4,x1) & n_male(x1) & n_ledge(x2) & n_boy(x1))