A group of men sit in a circle on a rooftop.
Some men are on a rooftop.
Both subjects are on a rooftop
exists e1 x1 x2 x3 x4.(on(e1,x4) & n_rooftop(x4) & in(e1,x3) & n_circle(x3) & Actor(e1,x1) & v_sit(e1) & of(x1,x2) & n_man(x2) & n_group(x1))
exists p1 x1.(exists x2.(on(x1,x2) & n_rooftop(x2)) & n_man(x1))