A closely contested swimming race.
The water is frozen.
one can not swim if the waster is frozen
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 e1 x1.(n_water(x1) & Theme(e1,x1) & v_freeze(e1))