A woman plays the violin.
A women plays a violin.
Both women are playing the violin.
exists e1 x1 x2.(n_violin(x2) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_woman(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_violin(x2) & n_woman(x1))