[Theresa] had lunch with her brother [George]. She told him about her son [James] getting a scholarship.
('George', 'James')
[Theresa] had lunch with her brother [George]. She told him about her son [James] getting a scholarship.
[{('George', 'nephew', 'James'): [('George', 'sister', 'Theresa'), ('Theresa', 'son', 'James')]}]
['sister', 'son']