[Theresa] picked her son [Tony] up from school. His sister [June] was home sick with a cold.
('Theresa', 'June')
[Theresa] picked her son [Tony] up from school. His sister [June] was home sick with a cold.
[{('Theresa', 'daughter', 'June'): [('Theresa', 'son', 'Tony'), ('Tony', 'sister', 'June')]}]
['son', 'sister']