[George] took his son [Jerry] fishing. [George] and [Jerry] stopped to give [Jerry]'s sister, [Ann], some fish.
('Ann', 'George')
[George] took his son [Jerry] fishing. [George] and [Jerry] stopped to give [Jerry]'s sister, [Ann], some fish.
[{('Ann', 'father', 'George'): [('Ann', 'brother', 'Jerry'), ('Jerry', 'father', 'George')]}]
['brother', 'father']