[Cindy] took her son [Leonard] to the football game. [Leonard] asked his grandmother [Frances] for a cookie. [Frances] smiled and said yes. [Richard] is son of [Cindy].
('Richard', 'Frances')
[Richard] is son of [Cindy]. [Cindy] took her son [Leonard] to the football game. [Leonard] asked his grandmother [Frances] for a cookie. [Frances] smiled and said yes.
[{('Richard', 'grandmother', 'Frances'): [('Richard', 'brother', 'Leonard'), ('Leonard', 'grandmother', 'Frances')]}, {('Richard', 'brother', 'Leonard'): [('Richard', 'mother', 'Cindy'), ('Cindy', 'son', 'Leonard')]}]
['mother', 'son', 'grandmother']