Dogs are pulling a sled across the snow.
Wolves are pulling that sled full of lumber.
Just because dogs are pulling a sled that does not mean it full of lumber.
exists e1 x1 x2 x3.(n_snow(x3) & across(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_pull(e1) & n_sled(x2) & n_dog(x1))
exists e1 e2 p1 x1 x2 x3.(a_topic(x1) & exists s1 x4.(of(s1,x4) & n_lumber(x4) & Theme(s1,x3) & a_full(s1)) & Topic(e2,p1) & Actor(e2,x3) & v_sled(e2) & (x1 = x3) & Actor(e1,x2) & v_pull(e1) & (x1 = x2) & n_wolf(x1))