A woman is making a speech.
A woman is reading a book.
One cannot be making a speech and reading a book simultaneously.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_make(e1) & n_speech(x2) & n_woman(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_read(e1) & n_book(x2) & n_woman(x1))