A boy does a cartwheel on a rock cliff.
The boy is brave.
A boy doesn't have to be brave when doing a cartwheel on a cliff.
exists e1 x1 x2 x3 x4.(on(e1,x3) & n_cliff(x3) & of(x3,x4) & n_rock(x4) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_cartwheel(x2) & n_boy(x1))
exists s1 x1.(n_boy(x1) & Theme(s1,x1) & a_brave(s1))