Four people posing for a photo in front of a pond.
People taking pictures of birds.
Taking pictures and posing for a photo are different activities.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & for(e1,x3) & in(x3,x4) & of(x4,x5) & n_pond(x5) & n_front(x4) & n_photo(x3) & Actor(e1,x2) & v_pose(e1) & (x1 = x2) & n_people(x1) & card_eq_4(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_take(e1) & of(x3,x4) & n_bird(x4) & n_picture(x3) & (x1 = x2) & n_people(x1))