A dog is galloping through the grass.
A dog is sleeping under the tree.
The dog is galloping, not sleeping.
exists e1 x1 x2.(n_grass(x2) & through(e1,x2) & Actor(e1,x1) & v_gallop(e1) & n_dog(x1))
exists e1 x1 x2.(n_tree(x2) & under(e1,x2) & Actor(e1,x1) & v_sleep(e1) & n_dog(x1))