People in a park near a refreshment stand.
The people are sitting in a bus.
Can't sit and stand at the same time.
exists x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & near(x2,x3) & n_stand(x3) & of(x3,x4) & n_refreshment(x4) & n_park(x2) & n_people(x1))
exists e1 x1 x2.(n_people(x1) & in(e1,x2) & n_bus(x2) & Actor(e1,x1) & v_sit(e1))