A family is sitting on the couch posing for a picture.
A family poses for a portrait.
A family portrait usually involves posing for a picture.
exists e1 e2 x1 x2 x3.(n_couch(x2) & for(e1,e2) & for(e2,x3) & n_picture(x3) & Actor(e2,x1) & v_pose(e2) & on(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_family(x1))
exists e1 x1 x2.(for(e1,x2) & n_portrait(x2) & Actor(e1,x1) & v_pose(e1) & n_family(x1))