Grayhound dog standing in still water.
A dog is in the lake.
we don't know if the still water is a lake or some other still water
exists s1 s2 x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_water(x3) & a_still(s2) & Theme(s2,x3) & n_standing(x1) & of(x1,x2) & n_dog(x2) & a_grayhound(s1) & Theme(s1,x1))
exists p1 x1 x2.(n_lake(x2) & in(x1,x2) & n_dog(x1))