[John] often goes out for lunch with his sister, [Janet]. [George] has a great father relationship with the beautiful [Janet].
('John', 'George')
[John] often goes out for lunch with his sister, [Janet]. [George] has a great father relationship with the beautiful [Janet].
[{('John', 'father', 'George'): [('John', 'sister', 'Janet'), ('Janet', 'father', 'George')]}]
['sister', 'father']