Two horsemen are chasing a cow around the lot.
Some people chasing a loose cow around the lot.
The horseman are referred to some people and the cow is loose it wasn't stated at first.
exists e1 x1 x2 x3.(n_lot(x3) & around(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & n_cow(x2) & n_horseman(x1) & card_eq_2(x1))
exists e1 s1 x1 x2 x3 x4.(n_lot(x4) & a_topic(x1) & around(e1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_chase(e1) & n_cow(x3) & a_loose(s1) & Theme(s1,x3) & (x1 = x2) & n_people(x1))