Two black dogs fight in a field.
Two dogs fighting for a bone.
Dogs can fight for other reasons than for a bone.
exists s1 x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_field(x3) & n_fight(x1) & of(x1,x2) & n_dog(x2) & a_black(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(a_topic(x1) & for(e1,x3) & n_bone(x3) & Actor(e1,x2) & v_fight(e1) & (x1 = x2) & n_dog(x1) & card_eq_2(x1))