A blond girl sits on a white porch railing.
The girl is using the railing as a balancing beam, practicing for gymnastics.
The girl cannot simultaneously sit on and be using the railing as a balance beam
exists e1 s1 s2 x1 x2 x3.(on(e1,x2) & n_railing(x2) & of(x2,x3) & n_porch(x3) & a_white(s2) & Theme(s2,x2) & Actor(e1,x1) & v_sit(e1) & n_girl(x1) & a_blond(s1) & Theme(s1,x1))
exists e1 e2 x1 x2 x3 x4 x5 x6.(n_railing(x2) & n_girl(x1) & Theme(e2,x2) & Actor(e2,x1) & v_use(e2) & as(x2,x3) & for(e1,x6) & n_gymnastics(x6) & Actor(e1,x5) & v_practice(e1) & (x3 = x5) & n_beam(x3) & of(x3,x4) & n_balancing(x4))