[David] went shopping for makeup with her sister [Lynn]. [David]'s son [Brandon] stayed at home. [Brandon] was happy to see his aunt [Lena].
('Lynn', 'Lena')
[David] went shopping for makeup with her sister [Lynn]. [David]'s son [Brandon] stayed at home. [Brandon] was happy to see his aunt [Lena].
[{('Lynn', 'sister', 'Lena'): [('Lynn', 'sister', 'David'), ('David', 'sister', 'Lena')]}, {('David', 'sister', 'Lena'): [('David', 'son', 'Brandon'), ('Brandon', 'aunt', 'Lena')]}]
['sister', 'son', 'aunt']