A lady in all white sits on a mat with a ball in her hand.
A lady sits on a mat.
A lady who sits on a mat is sitting on a mat.
exists x1 x5.(all x2.(n_white(x2) -> exists e1 x3 x4.(with(e1,x4) & in(x4,x5) & n_ball(x4) & on(e1,x3) & n_mat(x3) & Actor(e1,x1) & v_sit(e1) & in(x1,x2))) & n_hand(x5) & of(x5,x1) & n_female(x1) & n_lady(x1))
exists e1 x1 x2.(on(e1,x2) & n_mat(x2) & Actor(e1,x1) & v_sit(e1) & n_lady(x1))