People on an amusement park ride.
The amusement park is closed.
People can not be on a ride at  a park that is closed.
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 x1 x2.(n_park(x1) & of(x1,x2) & n_amusement(x2) & Theme(e1,x1) & v_close(e1))