A girl showing an art creation.
A girl hits a volleyball over a net.
One cannot be showing an art creation while also hitting a volleyball over a net
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_show(e1) & n_creation(x3) & of(x3,x4) & n_art(x4) & (x1 = x2) & n_girl(x1))
exists e1 x1 x2 x3.(over(e1,x3) & n_net(x3) & Theme(e1,x2) & Actor(e1,x1) & v_hit(e1) & n_volleyball(x2) & n_girl(x1))