A man in straw hat is looking at pictures on a table.
A man in a velvet hat takes photos.
A person is either wearing a straw hat or a velvet hat, not both
exists e1 x1 x2 x3 x4 x5.(on(e1,x5) & n_table(x5) & at(e1,x4) & n_picture(x4) & Actor(e1,x1) & v_look(e1) & in(x1,x2) & n_hat(x2) & of(x2,x3) & n_straw(x3) & n_man(x1))
exists e1 x1 x2 x3 x4.(Theme(e1,x4) & Actor(e1,x1) & v_take(e1) & n_photo(x4) & in(x1,x2) & n_hat(x2) & of(x2,x3) & n_velvet(x3) & n_man(x1))