[Dale] and his sister [Lillian] went to brunch today at the new diner. [Travis]'s father's name is [Dale].
('Lillian', 'Travis')
[Dale] and his sister [Lillian] went to brunch today at the new diner. [Travis]'s father's name is [Dale].
[{('Lillian', 'nephew', 'Travis'): [('Lillian', 'brother', 'Dale'), ('Dale', 'son', 'Travis')]}]
['brother', 'son']