[George] liked to play games with his sister, [Theresa]. [George] and his father [Clarence] went jogging by the lake.
('Clarence', 'Theresa')
[George] and his father [Clarence] went jogging by the lake. [George] liked to play games with his sister, [Theresa].
[{('Clarence', 'daughter', 'Theresa'): [('Clarence', 'son', 'George'), ('George', 'sister', 'Theresa')]}]
['son', 'sister']