People are talking and visiting on a bus.
The people are in the truck.
People are either on a bus or in a truck.
exists e1 e2 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 p1 x1 x2.(n_truck(x2) & n_people(x1) & in(x1,x2))