A Girl straddling a balance beam.
A girl doing a cartwheel on the ground.
A girl on the balance beam can't be on the ground.
exists e1 s1 x1 x2 x3.(a_topic(s1) & Theme(e1,x2) & Actor(e1,x1) & v_straddle(e1) & n_beam(x2) & of(x2,x3) & n_balance(x3) & (s1 = x1) & ne_org_girl(s1))
exists e1 x1 x2 x3 x4.(n_ground(x4) & a_topic(x1) & on(e1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_do(e1) & n_cartwheel(x3) & (x1 = x2) & n_girl(x1))