[Clarence] and his daughter [Nancy] are planning a trip to the mountains. They have n't been in almost 10 years. [Nancy] treasures her son, [Robert]. She recently attended his high school graduation and it was the proudest day of her life.
('Clarence', 'Robert')
[Clarence] and his daughter [Nancy] are planning a trip to the mountains. They have n't been in almost 10 years. [Nancy] treasures her son, [Robert]. She recently attended his high school graduation and it was the proudest day of her life.
[{('Clarence', 'grandson', 'Robert'): [('Clarence', 'daughter', 'Nancy'), ('Nancy', 'son', 'Robert')]}]
['daughter', 'son']