[Nicholas] liked to play games with his sister, [Lillian]. [Nicholas] and his daughter, [Mary] had tea.
('Mary', 'Lillian')
[Nicholas] and his daughter, [Mary] had tea. [Nicholas] liked to play games with his sister, [Lillian].
[{('Mary', 'aunt', 'Lillian'): [('Mary', 'father', 'Nicholas'), ('Nicholas', 'sister', 'Lillian')]}]
['father', 'sister']