This man is working in the refinery.
A man by a swimming pool.
The man is either in the refinery or by the pool.
exists e1 x1 x2.(n_refinery(x2) & n_man(x1) & in(e1,x2) & Actor(e1,x1) & v_work(e1))
exists x1 x2 x3.(a_topic(x1) & by(x1,x2) & n_pool(x2) & of(x2,x3) & n_swimming(x3) & n_man(x1))