A woman sings in a club with a guitarist behind her.
A woman is standing alone in a club.
If the woman is with a guitarist, she is not standing alone.
exists e1 x1 x2 x3.(in(e1,x2) & with(x2,x3) & behind(x3,x1) & n_female(x1) & n_guitarist(x3) & n_club(x2) & Actor(e1,x1) & v_sing(e1) & n_woman(x1))
exists e1 s1 x1 x2.(in(e1,x2) & n_club(x2) & a_alone(s1) & Manner(e1,s1) & Actor(e1,x1) & v_stand(e1) & n_woman(x1))