A man and a woman are leading two cows pulling a cart.
A man riding a horse.
If you are leading two cows, you need to walk with them, so you can not be riding a horse at the same time
exists e2 e1 x1 x2 x3 x4 x5 x6.(Theme(e2,x4) & Actor(e2,x1) & v_lead(e2) & Theme(e1,x6) & Actor(e1,x5) & v_pull(e1) & n_cart(x6) & (x4 = x5) & n_cow(x4) & card_eq_2(x4) & subset_of(x3,x1) & n_woman(x3) & subset_of(x2,x1) & n_man(x2))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_horse(x3) & (x1 = x2) & n_man(x1))