[Jerry] and his sister [Ann] went to brunch today at the new diner. [Clarence] and his grandson [Jerry] love to go to the ball park.
('Ann', 'Clarence')
[Jerry] and his sister [Ann] went to brunch today at the new diner. [Clarence] and his grandson [Jerry] love to go to the ball park.
[{('Ann', 'grandfather', 'Clarence'): [('Ann', 'brother', 'Jerry'), ('Jerry', 'grandfather', 'Clarence')]}]
['brother', 'grandfather']