[Lillian] took her son, [John], to go get baked goods from the local bakery. [Douglas] sent flowers to his mother [Lillian] for Mother's Day.
('Douglas', 'John')
[Douglas] sent flowers to his mother [Lillian] for Mother's Day. [Lillian] took her son, [John], to go get baked goods from the local bakery.
[{('Douglas', 'brother', 'John'): [('Douglas', 'mother', 'Lillian'), ('Lillian', 'son', 'John')]}]
['mother', 'son']