[George] and his sister [Theresa] love to play video games. [Theresa] has been waiting around all day for her son, [Travis].
('George', 'Travis')
[George] and his sister [Theresa] love to play video games. [Theresa] has been waiting around all day for her son, [Travis].
[{('George', 'nephew', 'Travis'): [('George', 'sister', 'Theresa'), ('Theresa', 'son', 'Travis')]}]
['sister', 'son']