Sled dogs pull a sled through a snowy forest.
Four dogs are pulling a sled.
There is no way of knowing that there were four dogs, it could have been any number of them.
exists e1 s1 s2 x1 x2 x3.(through(e1,x3) & n_forest(x3) & a_snowy(s2) & Theme(s2,x3) & Theme(e1,x2) & Actor(e1,x1) & v_pull(e1) & n_sled(x2) & n_dog(x1) & a_sled(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_pull(e1) & n_sled(x2) & n_dog(x1) & card_eq_4(x1))