A man and a woman are sleeping while sitting in a bus or train of some kind.
Two people in a mechanical device.
A man and a woman are two people, a bus is a mechanical device, and a train is a mechanical device.
exists e1 e2 x1 x2 x3 x4 x5.(while(e1,e2) & in(e2,x4) & of(x4,x5) & n_kind(x5) & (n_bus(x4) | n_train(x4)) & Actor(e2,x1) & v_sit(e2) & Actor(e1,x1) & v_sleep(e1) & subset_of(x3,x1) & n_woman(x3) & subset_of(x2,x1) & n_man(x2))
exists s1 x1 x2.(a_topic(x1) & in(x1,x2) & n_device(x2) & a_mechanical(s1) & Theme(s1,x2) & n_people(x1) & card_eq_2(x1))