Two people are on a sled pulled by many dogs.
Three people are pulling a sled full of dogs.
A sled is pulled by many dogs instead of people pulling a sled.
exists p1 x1.(exists e1 x2 x3 x4.(on(x1,x2) & Actor(e1,x4) & n_dog(x4) & n_quantity(x4) & Theme(e1,x3) & v_pull(e1) & (x2 = x3) & n_sled(x2)) & n_people(x1) & card_eq_2(x1))
exists e1 s1 x1 x2 x3 x4.(Theme(e1,x2) & Actor(e1,x1) & v_pull(e1) & of(s1,x4) & n_dog(x4) & Theme(s1,x3) & a_full(s1) & (x2 = x3) & n_sled(x2) & n_people(x1) & card_eq_3(x1))