[Lena] takes her son [Charles] to the park every Saturday. [Lynn] is the lovely aunt of [Charles] [Lynn] was talking about food with her sister [David].
('Lena', 'David')
[Lena] takes her son [Charles] to the park every Saturday. [Lynn] is the lovely aunt of [Charles] [Lynn] was talking about food with her sister [David].
[{('Lena', 'sister', 'David'): [('Lena', 'sister', 'Lynn'), ('Lynn', 'sister', 'David')]}, {('Lena', 'sister', 'Lynn'): [('Lena', 'son', 'Charles'), ('Charles', 'aunt', 'Lynn')]}]
['son', 'aunt', 'sister']