Here is a picture of a metro link worker making sure all passengers are safely riding on the bus.
The people are on a plane.
The passengers cannot be simultaneously on a plane and a bus.
exists p1 s1 x1 x2 x3 x6.(n_bus(x6) & Theme(s1,x1) & a_here(s1) & of(x1,x2) & exists e1 e2 p2 s2 x4 x5.(a_safely(s2) & Manner(e2,s2) & on(e2,x6) & Actor(e2,x4) & v_ride(e2) & all x7.(n_passenger(x7) -> exists s3.(Theme(s3,x7) & a_sure(s3))) & Topic(e1,p2) & Actor(e1,x5) & v_make(e1) & (x4 = x5) & n_worker(x4)) & that(x2,p1) & n_link(x2) & of(x2,x3) & n_metro(x3) & n_picture(x1))
exists p1 x1.(n_people(x1) & exists x2.(on(x1,x2) & n_plane(x2)))