[Amy] went to the museum with her son [Glen] and her father [Clarence].
('Glen', 'Clarence')
[Amy] went to the museum with her son [Glen] and her father [Clarence].
[{('Glen', 'grandfather', 'Clarence'): [('Glen', 'mother', 'Amy'), ('Amy', 'father', 'Clarence')]}]
['mother', 'father']