Teenagers are looking out the window of a bus.
Teens are inside of a bus
You have to be inside a bus to look out the window of the bus.
exists e1 x1 x2 x3.(n_window(x2) & out(e1,x2) & of(x2,x3) & n_bus(x3) & Actor(e1,x1) & v_look(e1) & n_teenager(x1))
exists p1 x1.(exists x2 x3.((x1 = x2) & of(x2,x3) & n_bus(x3) & n_inside(x2)) & n_teens(x1))