The skinny brown dog is walking on a fallen tree.
The dog is wagging its tail.
The skinny brown dog is walking on a fallen tree does not necessary that it is wagging its tail.
exists e1 s1 s2 x1 x2 x3.(n_dog(x1) & a_brown(s1) & Theme(s1,x1) & of(x1,x2) & n_skinny(x2) & on(e1,x3) & n_tree(x3) & a_fallen(s2) & Theme(s2,x3) & Actor(e1,x1) & v_walk(e1))
exists e1 x1 x2.(n_tail(x2) & of(x2,x1) & n_thing(x1) & n_dog(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wag(e1))