Four people playing soccer on a brown surface.
Four people playing football on a green field.
A surface cannot be both green and brown at the same time.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x4) & n_surface(x4) & a_brown(s1) & Theme(s1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_soccer(x3) & (x1 = x2) & n_people(x1) & card_eq_4(x1))
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x4) & n_field(x4) & a_green(s1) & Theme(s1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_football(x3) & (x1 = x2) & n_people(x1) & card_eq_4(x1))