A woman plays the guitar and sings.
woman plays free show
A woman may not be playing the guitar and singing for free.
exists e1 x1 x2 x3 x4.(n_sing(x4) & n_guitar(x3) & subset_of(x4,x2) & subset_of(x3,x2) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_woman(x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_show(x2) & a_free(s1) & Theme(s1,x2) & n_woman(x1))