Inside a grocery store, people shop for produce.
People are outside a grocery store.
The people can either be inside or outside, not both.
exists e1 x1 x2 x3 x4.(inside(e1,x3) & n_store(x3) & of(x3,x4) & n_grocery(x4) & for(e1,x2) & n_produce(x2) & Actor(e1,x1) & v_shop(e1) & n_people(x1))
exists p1 x1.(exists x2 x3.(outside(x1,x2) & n_store(x2) & of(x2,x3) & n_grocery(x3)) & n_people(x1))