A dog is running through tall grass.
A German Shepherd is swimming after a ball in a lake.
Not all dogs are German Shepherds and can not swim in a lake while running through grass.
exists e1 s1 x1 x2.(through(e1,x2) & n_grass(x2) & a_tall(s1) & Theme(s1,x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1))
exists e1 s1 x1 x2 x3.(after(e1,x2) & in(x2,x3) & n_lake(x3) & n_ball(x2) & Actor(e1,x1) & v_swim(e1) & ne_nam_shepherd(x1) & a_german(s1) & Theme(s1,x1))