[Nancy]'s father, [Clarence], took her to the bowling alley. [Nancy]'s daughter, [Louise], joined them because bowling was her favorite hobby.
('Louise', 'Clarence')
[Nancy]'s father, [Clarence], took her to the bowling alley. [Nancy]'s daughter, [Louise], joined them because bowling was her favorite hobby.
[{('Louise', 'grandfather', 'Clarence'): [('Louise', 'mother', 'Nancy'), ('Nancy', 'father', 'Clarence')]}]
['mother', 'father']