Person sleeping on the subway, while sitting beside someone.
There is a man sleeping next to a woman on the subway.
There is nothing to indicate that it is a man and woman sitting beside each other.
exists e2 e1 x1 x2 x3.(n_subway(x2) & ne_nam_person(x1) & while(e1,e2) & beside(e2,x3) & n_person(x3) & Actor(e2,x1) & v_sit(e2) & on(e1,x2) & Actor(e1,x1) & v_sleep(e1))
exists p1 x1 x5.(n_subway(x5) & exists e1 x2 x3 x4.((x1 = x2) & to(e1,x4) & on(x4,x5) & n_woman(x4) & r_next(e1) & Actor(e1,x3) & v_sleep(e1) & (x2 = x3) & n_man(x2)))