[Travis] and his mother, [Theresa], planted a garden for his grandmother [Ashley].
('Theresa', 'Ashley')
[Travis] and his mother, [Theresa], planted a garden for his grandmother [Ashley].
[{('Theresa', 'mother', 'Ashley'): [('Theresa', 'son', 'Travis'), ('Travis', 'grandmother', 'Ashley')]}]
['son', 'grandmother']