[Theresa] bought her son [James] a basketball for his birthday. [Nicolas] and his brother [James] played at jacks.
('Nicolas', 'Theresa')
[Nicolas] and his brother [James] played at jacks. [Theresa] bought her son [James] a basketball for his birthday.
[{('Nicolas', 'mother', 'Theresa'): [('Nicolas', 'brother', 'James'), ('James', 'mother', 'Theresa')]}]
['brother', 'mother']