[David] and her sister [Lynn] went shopping at the mall. [David]'s daughter [Marie] stayed home to study. [Marie] does n't like having to babysit her younger brother, [Johnson].
('Lynn', 'Johnson')
[David] and her sister [Lynn] went shopping at the mall. [David]'s daughter [Marie] stayed home to study. [Marie] does n't like having to babysit her younger brother, [Johnson].
[{('Lynn', 'nephew', 'Johnson'): [('Lynn', 'sister', 'David'), ('David', 'son', 'Johnson')]}, {('David', 'son', 'Johnson'): [('David', 'daughter', 'Marie'), ('Marie', 'brother', 'Johnson')]}]
['sister', 'daughter', 'brother']