four rockers posing on a tree stump.
Seven business men are on a picnic table.
The subject is either a group of business men or rockers.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & n_stump(x3) & of(x3,x4) & n_tree(x4) & Actor(e1,x2) & v_pose(e1) & (x1 = x2) & n_rocker(x1) & card_eq_4(x1))
exists p1 x1 x2.(exists x3 x4.(on(x1,x3) & n_table(x3) & of(x3,x4) & n_picnic(x4)) & n_man(x1) & of(x1,x2) & n_business(x2) & card_eq_7(x1))