A crowd is sitting on a porch outside.
a group has gathered near a building
By definition, a porch is near a building.
exists e1 x1 x2 x3.(on(e1,x2) & n_outside(x2) & of(x2,x3) & n_porch(x3) & Actor(e1,x1) & v_sit(e1) & n_crowd(x1))
exists e1 x1 x2.(near(e1,x2) & n_building(x2) & Actor(e1,x1) & v_gather(e1) & n_group(x1))