Two people pose for the camera.
People pose for a family picture.
People posing for a photo are not necessarily family members.
exists e1 x1 x2.(n_camera(x2) & for(e1,x2) & Actor(e1,x1) & v_pose(e1) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(for(e1,x2) & n_picture(x2) & of(x2,x3) & n_family(x3) & Actor(e1,x1) & v_pose(e1) & n_people(x1))