People on an amusement park ride.
The people are riding a ferris wheel.
Not all rides are ferris wheel rides.
exists x1 x2 x3 x4.(a_topic(x1) & on(x1,x2) & n_ride(x2) & of(x2,x4) & n_park(x4) & of(x2,x3) & n_amusement(x3) & n_people(x1))
exists e1 s1 x1 x2.(n_people(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_wheel(x2) & a_ferris(s1) & Theme(s1,x2))