A man and woman sleeping on a bus.
Two people sitting on a bus.
A man and a woman are two people.  Sleeping on a bus implies they are sitting.
exists e1 s1 x1 x2 x3 x4.(a_topic(s1) & on(e1,x4) & n_bus(x4) & Actor(e1,x3) & v_sleep(e1) & (s1 = x3) & n_woman(x2) & n_man(x1) & subset_of(x2,s1) & subset_of(x1,s1))
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_bus(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_people(x1) & card_eq_2(x1))