A group of people are sitting on the porch of a brick building.
Several people congregated outside.
A group of people are several people. If they're on a porch they're outside.
exists e1 x1 x2 x3 x4 x5.(n_porch(x3) & on(e1,x3) & of(x3,x4) & n_building(x4) & of(x4,x5) & n_brick(x5) & Actor(e1,x1) & v_sit(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 s1 s2 x1 x2.(a_topic(x1) & a_outside(s2) & Manner(e1,s2) & Theme(e1,x2) & v_congregate(e1) & (x1 = x2) & n_people(x1) & a_several(s1) & Theme(s1,x1))