[Clarence] is proud of his son. His name is [George]. [Janet]'s father is named [George].
('Janet', 'Clarence')
[Janet]'s father is named [George]. [Clarence] is proud of his son. His name is [George].
[{('Janet', 'grandfather', 'Clarence'): [('Janet', 'father', 'George'), ('George', 'father', 'Clarence')]}]
['father', 'father']