A skateboarder flies off the stairs.
A skateboarder flies off the stairs, injuring himself on the landing.
A skateboarder could fly off of stairs without injuring himself.
exists e1 s1 x1 x2.(n_stair(x2) & a_off(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_fly(e1) & n_skateboarder(x1))
exists e1 e2 s1 x1 x2 x3.(n_landing(x3) & n_male(x2) & n_stair(x2) & for(e1,e2) & on(e2,x3) & Theme(e2,x2) & Actor(e2,x1) & v_injure(e2) & a_off(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_fly(e1) & n_skateboarder(x1))