[Lillian] invited her brother [Nicholas] to her daughter [Ann]'s engagement party.
('Ann', 'Nicholas')
[Lillian] invited her brother [Nicholas] to her daughter [Ann]'s engagement party.
[{('Ann', 'uncle', 'Nicholas'): [('Ann', 'mother', 'Lillian'), ('Lillian', 'brother', 'Nicholas')]}]
['mother', 'brother']