Couple sleep on subway line sitting next to each other.
Two people are riding the subway.
To sleep on a subway is a way of riding the subway.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & on(x1,x3) & all x6.(n_other(x6) -> to(e1,x6)) & r_next(e1) & Actor(e1,x5) & v_sit(e1) & (x3 = x5) & n_line(x3) & of(x3,x4) & n_subway(x4) & n_sleep(x1) & of(x1,x2) & n_couple(x2))
exists e1 x1 x2.(n_subway(x2) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_people(x1) & card_eq_2(x1))