Two healthy horses play in a field.
Two horses are standing in a field.
Two horses cannot be standing and playing at the same time.
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.(in(e1,x2) & n_field(x2) & Actor(e1,x1) & v_stand(e1) & n_horse(x1) & card_eq_2(x1))