A male passenger listens to an iPod, while riding a train.
A passenger eating an apple and listening music.
A male passenger listens to an iPod, while riding a train does not indicate that he is eating an apple and listening music.
exists e2 e1 s1 x1 x2 x3.(while(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_ride(e2) & n_train(x3) & to(e1,x2) & n_ipod(x2) & Actor(e1,x1) & v_listen(e1) & n_passenger(x1) & a_male(s1) & Theme(s1,x1))
exists e1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_eat(e1) & subset_of(x5,x3) & n_music(x5) & of(x5,x6) & n_listening(x6) & subset_of(x4,x3) & n_apple(x4) & (x1 = x2) & n_passenger(x1))