People are socializing outside a bookstore.
People are outside a drugstore.
The people can't be outside a bookstore and outside a drugstore at the same time.
exists e1 x1 x2.(outside(e1,x2) & n_bookstore(x2) & Actor(e1,x1) & v_socialize(e1) & n_people(x1))
exists p1 x1.(exists x2.(outside(x1,x2) & n_drugstore(x2)) & n_people(x1))