[Dennis] wanted to buy something special for his grandmother [Ashley]. He did n't know what to get her so he asked his sister [Mary] for advice.
('Mary', 'Ashley')
[Dennis] wanted to buy something special for his grandmother [Ashley]. He did n't know what to get her so he asked his sister [Mary] for advice.
[{('Mary', 'grandmother', 'Ashley'): [('Mary', 'brother', 'Dennis'), ('Dennis', 'grandmother', 'Ashley')]}]
['brother', 'grandmother']