A woman and a man playing instruments.
The man and woman are playing the clarinet.
Not all musical instruments are the clarinet.
exists s1 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & n_instrument(x2) & of(x2,x4) & n_playing(x4) & of(x2,x3) & n_man(x3) & subset_of(x1,s1) & n_woman(x1))
exists e1 x1 x2 x3 x4.(n_clarinet(x4) & n_woman(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1) & Theme(e1,x4) & Actor(e1,x1) & v_play(e1))