[Timothy] asked his mother [Lillian] where babies came from. [Lillian] told him they came from the stork. [Lillian] and her father [Clarence] went to the park. They had a wonderful time there, feeding the ducks.
('Timothy', 'Clarence')
[Timothy] asked his mother [Lillian] where babies came from. [Lillian] told him they came from the stork. [Lillian] and her father [Clarence] went to the park. They had a wonderful time there, feeding the ducks.
[{('Timothy', 'grandfather', 'Clarence'): [('Timothy', 'mother', 'Lillian'), ('Lillian', 'father', 'Clarence')]}]
['mother', 'father']