A male gymnast balances on a beam bar.
A gymnast is on a balance beam.
A gymnast doesn't have to be a man.
exists s1 x1 x2 x3 x4.(a_topic(x1) & on(x1,x3) & n_bar(x3) & of(x3,x4) & n_beam(x4) & n_balance(x1) & of(x1,x2) & n_gymnast(x2) & a_male(s1) & Theme(s1,x1))
exists p1 x1.(exists x2 x3.(on(x1,x2) & n_beam(x2) & of(x2,x3) & n_balance(x3)) & n_gymnast(x1))