A crowd of people are in a street.
the people are in the house
The people can't be in the house while on the street.
exists p1 x1 x2.(exists x3.(in(x1,x3) & n_street(x3)) & of(x1,x2) & n_people(x2) & n_crowd(x1))
exists p1 x1 x2.(n_house(x2) & n_people(x1) & in(x1,x2))