sunbathers on benches on boardwalk at the beach.
People are walking along the beach.
People cannot be on the benches and walking along the beach simultaneously.
exists x1 x2 x3 x4.(n_beach(x4) & a_topic(x1) & on(x1,x2) & on(x2,x3) & at(x3,x4) & n_boardwalk(x3) & n_bench(x2) & n_sunbather(x1))
exists e1 x1 x2.(n_beach(x2) & along(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_people(x1))