[Tina] talks to her sister [Mildred] on the phone each night before bed. [Theodore] is lucky if he talks to his sister [Tina] once a month. [Theodore] loves playing hide and seek with his grandfather [James].
('Mildred', 'James')
[Tina] talks to her sister [Mildred] on the phone each night before bed. [Theodore] is lucky if he talks to his sister [Tina] once a month. [Theodore] loves playing hide and seek with his grandfather [James].
[{('Mildred', 'grandfather', 'James'): [('Mildred', 'sister', 'Tina'), ('Tina', 'grandfather', 'James')]}, {('Tina', 'grandfather', 'James'): [('Tina', 'brother', 'Theodore'), ('Theodore', 'grandfather', 'James')]}]
['sister', 'brother', 'grandfather']