Four people are in some type of cement building with the number 93 painted on the wall.
Four people are in a cement building with nothing painted on the wall.
It can either be the number 93, or nothing painted on the wall, not both.
exists p1 x1 x5 x7.(n_wall(x7) & n_number(x5) & card_eq_93(x5) & exists e1 x2 x3 x4 x6.(in(x1,x2) & with(x2,x5) & on(e1,x7) & Theme(e1,x6) & v_paint(e1) & (x5 = x6) & of(x2,x3) & n_building(x3) & of(x3,x4) & n_cement(x4) & n_type(x2)) & n_people(x1) & card_eq_4(x1))
exists p1 x1 x6.(n_wall(x6) & exists x2 x3.(-exists e1 x4 x5.(in(x1,x2) & with(x2,x4) & on(e1,x6) & Theme(e1,x5) & v_paint(e1) & (x4 = x5) & n_thing(x4)) & n_building(x2) & of(x2,x3) & n_cement(x3)) & n_people(x1) & card_eq_4(x1))