A boy on a skateboard balances on a red beam.
The boy won't fall.
Balancing with a skateboard does not necessarily mean the boy will fall.
exists e1 s1 x1 x2 x3.(on(e1,x3) & n_beam(x3) & a_red(s1) & Theme(s1,x3) & Actor(e1,x1) & v_balance(e1) & on(x1,x2) & n_skateboard(x2) & n_boy(x1))
exists x1.(n_boy(x1) & -exists e1.(Actor(e1,x1) & v_fall(e1)))