People are talking and visiting on a bus.
The people are talking about the weather.
We don't know that the people are talking about the weather.
exists e2 e1 x1 x2 x3 x4.(on(e2,x4) & n_bus(x4) & Actor(e2,x3) & v_visit(e2) & n_people(x3) & Theme(e1,x2) & Actor(e1,x1) & v_talk(e1) & n_bus(x2) & n_people(x1))
exists e1 x1 x2.(n_weather(x2) & n_people(x1) & about(e1,x2) & Actor(e1,x1) & v_talk(e1))