[Lillian] and her father [Clarence] went to the park. They had a wonderful time there, feeding the ducks. [Lillian] took her daughter [Andrea] to school during the cold winter morning.
('Andrea', 'Clarence')
[Lillian] took her daughter [Andrea] to school during the cold winter morning. [Lillian] and her father [Clarence] went to the park. They had a wonderful time there, feeding the ducks.
[{('Andrea', 'grandfather', 'Clarence'): [('Andrea', 'mother', 'Lillian'), ('Lillian', 'father', 'Clarence')]}]
['mother', 'father']