A woman in a white skirt is standing outside of a building with a man.
A woman in a blue skirt is standing outside of a building with a man.
The skirt cannot be white and blue.
exists e1 s1 x1 x2 x3 x4.(with(e1,x4) & n_man(x4) & of(e1,x3) & n_building(x3) & r_outside(e1) & Actor(e1,x1) & v_stand(e1) & in(x1,x2) & n_skirt(x2) & a_white(s1) & Theme(s1,x2) & n_woman(x1))
exists e1 s1 x1 x2 x3 x4.(with(e1,x4) & n_man(x4) & of(e1,x3) & n_building(x3) & r_outside(e1) & Actor(e1,x1) & v_stand(e1) & in(x1,x2) & n_skirt(x2) & a_blue(s1) & Theme(s1,x2) & n_woman(x1))