A closely contested swimming race.
There are females visible in the water
A swimming race does not only have to contain females, nor do the people and the race need to visible to anyone for it to take place.
exists e1 x1 x2.(a_topic(x1) & n_race(x1) & of(x1,x2) & n_swimming(x2) & Theme(e1,x1) & v_contest(e1) & r_closely(x1))
exists p1 x1 x4.(n_water(x4) & exists s1 x2 x3.((x1 = x2) & in(s1,x4) & Theme(s1,x3) & a_visible(s1) & (x2 = x3) & n_female(x2)))