[Nancy] took her son [Jeff] to the park for the afternoon. [Jeff] is the great aunt of the marvelous [Lillian].
('Nancy', 'Lillian')
[Nancy] took her son [Jeff] to the park for the afternoon. [Jeff] is the great aunt of the marvelous [Lillian].
[{('Nancy', 'sister', 'Lillian'): [('Nancy', 'son', 'Jeff'), ('Jeff', 'aunt', 'Lillian')]}]
['son', 'aunt']