Dogs pull a sled in the snow.
Dogs are in the snow.
A sled is used in the snow.
exists e1 x1 x2 x3.(n_snow(x3) & Theme(e1,x2) & Actor(e1,x1) & v_pull(e1) & in(x2,x3) & n_sled(x2) & n_dog(x1))
exists p1 x1 x2.(n_snow(x2) & in(x1,x2) & n_dog(x1))