[Nicholas] and his daughter, [Mary] had tea. [Nicholas] went to the baseball game with his brother [George].
('Mary', 'George')
[Nicholas] and his daughter, [Mary] had tea. [Nicholas] went to the baseball game with his brother [George].
[{('Mary', 'uncle', 'George'): [('Mary', 'father', 'Nicholas'), ('Nicholas', 'brother', 'George')]}]
['father', 'brother']