There are two coast guard men patrolling the water in their craft.
The two women patrol the pool.
The subject must be either two coast guard men or two women and cannot be both.  Either they are patrolling the water, or they are patrolling the pool and cannot be doing both.
exists p1 x1 x6 x7.(n_craft(x7) & of(x7,x6) & n_thing(x6) & n_water(x6) & exists e1 x2 x3 x4 x5.((x1 = x2) & Theme(e1,x6) & Actor(e1,x5) & v_patrol(e1) & in(x6,x7) & (x2 = x5) & n_man(x2) & of(x2,x4) & n_guard(x4) & of(x2,x3) & n_coast(x3) & card_eq_2(x2)))
exists e1 x1 x2.(n_pool(x2) & n_woman(x1) & card_eq_2(x1) & Theme(e1,x2) & Actor(e1,x1) & v_patrol(e1))