A female and a male each sit on the sofa with a child.
A family outside playing
They can't be outside playing and also be inside siting on a sofa.
exists e1 x1 x2 x3 x4.(n_sofa(x3) & with(e1,x4) & n_child(x4) & on(e1,x3) & Actor(e1,x1) & v_sit(e1) & all x5 x6.(((x5 = x6) & n_male(x6)) -> subset_of(x5,x1)) & subset_of(x2,x1) & n_female(x2))
exists s1 x1 x2.(a_topic(x1) & n_playing(x1) & a_outside(s1) & Theme(s1,x1) & of(x1,x2) & n_family(x2))