Two horses are neck to neck at a race.
Horses are being raced.
If there are two horses neck to neck at a race then there are horses being raced.
exists s1 x1 x2 x3.(at(s1,x3) & n_race(x3) & to(s1,x2) & n_neck(x2) & Theme(s1,x1) & a_neck(s1) & n_horse(x1) & card_eq_2(x1))
exists e1 x1.(Theme(e1,x1) & v_race(e1) & n_horse(x1))