Two healthy horses play in a field.
The horses compete in races.
Not every horse competes in races.
exists e1 s1 x1 x2.(in(e1,x2) & n_field(x2) & Actor(e1,x1) & v_play(e1) & n_horse(x1) & a_healthy(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 x1 x2.(n_horse(x1) & in(e1,x2) & n_race(x2) & Actor(e1,x1) & v_compete(e1))