[Lillian]'s son called [Jerry] is good and intelligent boy [Lillian] picked up her daughter [Ann] from school early.
('Ann', 'Jerry')
[Lillian] picked up her daughter [Ann] from school early. [Lillian]'s son called [Jerry] is good and intelligent boy
[{('Ann', 'brother', 'Jerry'): [('Ann', 'mother', 'Lillian'), ('Lillian', 'son', 'Jerry')]}]
['mother', 'son']