The skateboard is falling away from the skateboarder as he attempt a jump.
Someone is riding a bicycle.
Someone riding a bicycle cannot be a skateboarder who attempts a jump.
exists e2 e1 x1 x2 x3 x4.(n_skateboarder(x3) & n_male(x3) & n_skateboard(x1) & Theme(e2,x4) & Actor(e2,x1) & v_attempt(e2) & n_jump(x4) & from(e1,x3) & r_away(e1) & as(e1,x3) & Actor(e1,x2) & v_fall(e1) & (x1 = x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bicycle(x2) & n_person(x1))