A group of people stare at a building.
Many people are in front of a building.
If you are at a building you could be in front of a building
exists e1 x1 x2 x3.(at(e1,x3) & n_building(x3) & Actor(e1,x1) & v_stare(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists p1 x1.(exists x2 x3.(in(x1,x2) & of(x2,x3) & n_building(x3) & n_front(x2)) & n_people(x1) & n_quantity(x1))