[David] has a son named [Bobby]. [Bobby] did n't get along very well with his sister [Evangeline] for some reason. [Evangeline] always loved when her grandmother [Frances] visited, because she always got presents.
('David', 'Frances')
[David] has a son named [Bobby]. [Bobby] did n't get along very well with his sister [Evangeline] for some reason. [Evangeline] always loved when her grandmother [Frances] visited, because she always got presents.
[{('David', 'mother', 'Frances'): [('David', 'son', 'Bobby'), ('Bobby', 'grandmother', 'Frances')]}, {('Bobby', 'grandmother', 'Frances'): [('Bobby', 'sister', 'Evangeline'), ('Evangeline', 'grandmother', 'Frances')]}]
['son', 'sister', 'grandmother']