A skater leaps through the air near a railing
The biker crashes his bike into a wall.
There can either be a skater or the biker
exists e1 x1 x2 x3.(n_air(x2) & through(e1,x2) & near(x2,x3) & n_railing(x3) & Actor(e1,x1) & v_leap(e1) & n_skater(x1))
exists e1 x1 x2 x3.(n_bike(x2) & of(x2,x1) & n_male(x1) & n_biker(x1) & into(e1,x3) & n_wall(x3) & Theme(e1,x2) & Actor(e1,x1) & v_crash(e1))