[Lynn] bought her son [Don] a basketball for his birthday. [Lynn] liked to take her son [Clarence] and his sister [Andrea] out to the park whenever she had the time.
('Don', 'Andrea')
[Lynn] bought her son [Don] a basketball for his birthday. [Lynn] liked to take her son [Clarence] and his sister [Andrea] out to the park whenever she had the time.
[{('Don', 'sister', 'Andrea'): [('Don', 'mother', 'Lynn'), ('Lynn', 'daughter', 'Andrea')]}, {('Lynn', 'daughter', 'Andrea'): [('Lynn', 'son', 'Clarence'), ('Clarence', 'sister', 'Andrea')]}]
['mother', 'son', 'sister']