[James] took his daughter [Lynn] out for lunch one day. [Lynn] asked if she could bring her son [Clarence] and [James] said okay. [Clarence] ca n't stand his unfriendly aunt [David].
('James', 'David')
[James] took his daughter [Lynn] out for lunch one day. [Lynn] asked if she could bring her son [Clarence] and [James] said okay. [Clarence] ca n't stand his unfriendly aunt [David].
[{('James', 'daughter', 'David'): [('James', 'daughter', 'Lynn'), ('Lynn', 'sister', 'David')]}, {('Lynn', 'sister', 'David'): [('Lynn', 'son', 'Clarence'), ('Clarence', 'aunt', 'David')]}]
['daughter', 'son', 'aunt']