A person is working in the garden.
a person in garden
Just because A person is working in the garden doesn't mean is in the garden.
exists e1 x1 x2.(n_garden(x2) & in(e1,x2) & Actor(e1,x1) & v_work(e1) & n_person(x1))
exists x1 x2.(a_topic(x1) & in(x1,x2) & n_garden(x2) & n_person(x1))