A female and a male each sit on the sofa with a child.
People are in school.
People can't be in school and sitting on the 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 x6 x5.(((x5 = x6) & n_male(x6)) -> subset_of(x5,x1)) & subset_of(x2,x1) & n_female(x2))
exists p1 x1.(exists x2.(in(x1,x2) & n_school(x2)) & n_people(x1))