[Ashley]'s son [Wayne] called her on the phone to tell her that his daughter [Heidi] was born.
('Heidi', 'Ashley')
[Ashley]'s son [Wayne] called her on the phone to tell her that his daughter [Heidi] was born.
[{('Heidi', 'grandmother', 'Ashley'): [('Heidi', 'father', 'Wayne'), ('Wayne', 'mother', 'Ashley')]}]
['father', 'mother']