[Irvin] and his sister [Tina] went with their father [Wesley] to pick out a gift for [Irvin]'s grandmother [Frances]'s birthday.
('Tina', 'Frances')
[Irvin] and his sister [Tina] went with their father [Wesley] to pick out a gift for [Irvin]'s grandmother [Frances]'s birthday.
[{('Tina', 'grandmother', 'Frances'): [('Tina', 'brother', 'Irvin'), ('Irvin', 'grandmother', 'Frances')]}, {('Tina', 'brother', 'Irvin'): [('Tina', 'father', 'Wesley'), ('Wesley', 'son', 'Irvin')]}]
['father', 'son', 'grandmother']