A man is sitting on a platform next to a building ledge.
A man is working on the building.
You can not infer he is working.
exists e1 x1 x2 x3 x4 x5.(on(e1,x2) & to(x3,x4) & n_ledge(x4) & of(x4,x5) & n_building(x5) & next(x2,x3) & n_thing(x3) & n_platform(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 x1 x2.(n_building(x2) & on(e1,x2) & Actor(e1,x1) & v_work(e1) & n_man(x1))