A woman is reading a book on the subway.
A woman is riding a train.
A subway is type of a train. A woman on subway implies she is riding a train.
exists e1 x1 x2 x3.(n_subway(x3) & Theme(e1,x2) & Actor(e1,x1) & v_read(e1) & on(x2,x3) & n_book(x2) & n_woman(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_train(x2) & n_woman(x1))