three ghostbuster impersonators
Three people are being ghostbusters for halloween.
Not all ghostbuster impersonators are being ghostbusters for halloween.
exists x1 x2.(n_impersonator(x1) & of(x1,x2) & n_ghostbuster(x2) & card_eq_3(x1) & a_topic(x1))
exists p1 x1.(exists x2 x3.((x1 = x2) & for(x2,x3) & n_halloween(x3) & n_ghostbuster(x2)) & n_people(x1) & card_eq_3(x1))