[Theresa] was helping her son [Travis] complete math homework when it reminded her how her father [Clarence] used to help her finish homework, too.
('Travis', 'Clarence')
[Theresa] was helping her son [Travis] complete math homework when it reminded her how her father [Clarence] used to help her finish homework, too.
[{('Travis', 'grandfather', 'Clarence'): [('Travis', 'mother', 'Theresa'), ('Theresa', 'father', 'Clarence')]}]
['mother', 'father']