A group of people are sitting on the porch of a brick building.
A man sits alone.
A group of people is not a man but consists of several men.
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 x1.(a_alone(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1) & n_man(x1))