[Lillian] loves playing chess her son. His name is [John]. [Jerry] needed his brother, [John], to help with a problem
('Jerry', 'Lillian')
[Jerry] needed his brother, [John], to help with a problem [Lillian] loves playing chess her son. His name is [John].
[{('Jerry', 'mother', 'Lillian'): [('Jerry', 'brother', 'John'), ('John', 'mother', 'Lillian')]}]
['brother', 'mother']