[Jacob] and his brother [Jeff] went to visit [Jacob]'s grandmother [Ashley] for Thanksgiving.
('Jeff', 'Ashley')
[Jacob] and his brother [Jeff] went to visit [Jacob]'s grandmother [Ashley] for Thanksgiving.
[{('Jeff', 'grandmother', 'Ashley'): [('Jeff', 'brother', 'Jacob'), ('Jacob', 'grandmother', 'Ashley')]}]
['brother', 'grandmother']