A group of twenty or so people posing for a picture.
A group of twenty dogs are posing for the calendar's picture.
People and dogs are not same.
exists e1 x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & for(e1,x4) & n_picture(x4) & Actor(e1,x3) & v_pose(e1) & (x2 = x3) & ((n_people(x2) & card_eq_20(x2)) | exists s1.(n_people(x2) & a_so(s1) & Theme(s1,x2))) & n_group(x1))
exists e1 x1 x2 x3 x4.(n_picture(x4) & of(x4,x3) & n_calendar(x3) & for(e1,x4) & Actor(e1,x1) & v_pose(e1) & of(x1,x2) & n_dog(x2) & card_eq_20(x2) & n_group(x1))