Probably Lois, your Aunt Lois.
( ( ( ( Probably Lois ) , ) ( your ( Aunt Lois ) ) ) . )
(ROOT (NP (NP (NNP Probably) (NNP Lois)) (, ,) (NP (PRP$ your) (NNP Aunt) (NNP Lois)) (. .)))
It isn't your aunt or Lois.
( It ( ( ( is n't ) ( your ( ( aunt or ) Lois ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (RB n't) (NP (PRP$ your) (NN aunt) (CC or) (NNS Lois))) (. .)))