Four people posing for a picture
People are posing for a professional photographer.
Not all people taking a picture are professional photographers.
exists e1 x1 x2 x3.(a_topic(x1) & for(e1,x3) & n_picture(x3) & Actor(e1,x2) & v_pose(e1) & (x1 = x2) & n_people(x1) & card_eq_4(x1))
exists e1 s1 x1 x2.(for(e1,x2) & n_photographer(x2) & a_professional(s1) & Theme(s1,x2) & Actor(e1,x1) & v_pose(e1) & n_people(x1))