[Theresa] has a sister named [Amy] and a brother named [George].
('Theresa', 'Amy')
[Theresa] has a sister named [Amy] and a brother named [George].
[{('Theresa', 'sister', 'Amy'): [('Theresa', 'brother', 'George'), ('George', 'sister', 'Amy')]}]
['brother', 'sister']