[Charles] asked his son, [Wesley], to help paint his house. [Charles] bought a new refrigerator for his mother [Lena]. [David] and her sister [Lena] played golf together. [David] won easily.
('Wesley', 'David')
[Charles] asked his son, [Wesley], to help paint his house. [Charles] bought a new refrigerator for his mother [Lena]. [David] and her sister [Lena] played golf together. [David] won easily.
[{('Wesley', 'sister', 'David'): [('Wesley', 'son', 'Charles'), ('Charles', 'aunt', 'David')]}, {('Charles', 'aunt', 'David'): [('Charles', 'mother', 'Lena'), ('Lena', 'sister', 'David')]}]
['son', 'mother', 'sister']