[Lillian] talks to her son [Douglas] every day. [Lillian], [Jerry] mother, likes to take him to eat ice cream on Sundays.
('Jerry', 'Douglas')
[Lillian], [Jerry] mother, likes to take him to eat ice cream on Sundays. [Lillian] talks to her son [Douglas] every day.
[{('Jerry', 'brother', 'Douglas'): [('Jerry', 'mother', 'Lillian'), ('Lillian', 'son', 'Douglas')]}]
['mother', 'son']