Three people stand and face video machines.
People riding a roller coaster
Stand and face and riding are different activities. Video machines and roller coaster are two different things.
exists e2 e1 s1 x1 x2 x3.(Theme(e2,x3) & Actor(e2,x2) & v_face(e2) & n_machine(x3) & a_video(s1) & Theme(s1,x3) & n_people(x2) & card_eq_3(x2) & Actor(e1,x1) & v_stand(e1) & n_people(x1) & card_eq_3(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_coaster(x3) & of(x3,x4) & n_roller(x4) & (x1 = x2) & n_people(x1))