A man is selling art to a woman.
A woman is buying some art.
A woman is buying some art if there is a man selling art to her.
exists e1 x1 x2 x3.(to(e1,x3) & n_woman(x3) & Theme(e1,x2) & Actor(e1,x1) & v_sell(e1) & n_art(x2) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_buy(e1) & n_art(x2) & n_woman(x1))