A person rides a four wheeled vehicle on sand dunes.
People watching a movie.
It's either a person or people, not both. The person cannotr be riding a four wheeled vehicle on sand dunes and be watching a movie at the same time.
exists e1 s1 x1 x2 x3 x4.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & on(x2,x3) & n_dune(x3) & of(x3,x4) & n_sand(x4) & n_vehicle(x2) & a_wheeled(s1) & Theme(s1,x2) & card_eq_4(x2) & n_person(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_watch(e1) & n_movie(x3) & (x1 = x2) & n_people(x1))