people stand outside a building.
A group of people stands outside of a building
People stand but a group stands outside a building.
exists e1 x1 x2.(outside(e1,x2) & n_building(x2) & Actor(e1,x1) & v_stand(e1) & n_people(x1))
exists e1 x1 x2 x3.(of(e1,x3) & n_building(x3) & r_outside(e1) & Actor(e1,x1) & v_stand(e1) & of(x1,x2) & n_people(x2) & n_group(x1))