Two people on an amusement park ride.
Two people are working diligently.
They would not be working if they are on a ride.
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) & card_eq_2(x1))
exists e1 s1 x1.(a_diligently(s1) & Manner(e1,s1) & Actor(e1,x1) & v_work(e1) & n_people(x1) & card_eq_2(x1))