Two people are digging the ground by a bunch of boats.
These people are searching for treasure.
Not all people digging are searching for treasure.
exists e1 x1 x2 x3 x4.(n_ground(x2) & by(e1,x3) & of(x3,x4) & n_boat(x4) & n_bunch(x3) & Theme(e1,x2) & Actor(e1,x1) & v_dig(e1) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_people(x1) & for(e1,x2) & n_treasure(x2) & Actor(e1,x1) & v_search(e1))