Two girls wearing bikins are standing in the lake.
The girls are wearing bikinis.
It is not clear whether there are other girls, so The cannot be used.
exists e1 e2 x1 x2 x3 x4.(n_lake(x4) & in(e2,x4) & Actor(e2,x1) & v_stand(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_bikin(x3) & (x1 = x2) & n_girl(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_girl(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_bikini(x2))