Four medium-sized dogs wrestle with each other on a grass field.
The four dogs are wrestling.
Four dogs wrestle each other on a grass field.
exists e1 s1 x1 x2 x3.(on(e1,x2) & n_field(x2) & of(x2,x3) & n_grass(x3) & all x4.(n_other(x4) -> with(e1,x4)) & Actor(e1,x1) & v_wrestle(e1) & n_dog(x1) & a_medium-sized(s1) & Theme(s1,x1) & card_eq_4(x1))
exists e1 x1.(n_dog(x1) & card_eq_4(x1) & Actor(e1,x1) & v_wrestle(e1))