[Michelle] went out to lunch with her sister [Katherine] and her son [Dale]. [Matthew] and his nephew [Dale] went hunting together last weekend.
('Katherine', 'Matthew')
[Michelle] went out to lunch with her sister [Katherine] and her son [Dale]. [Matthew] and his nephew [Dale] went hunting together last weekend.
[{('Katherine', 'brother', 'Matthew'): [('Katherine', 'sister', 'Michelle'), ('Michelle', 'brother', 'Matthew')]}, {('Michelle', 'brother', 'Matthew'): [('Michelle', 'son', 'Dale'), ('Dale', 'uncle', 'Matthew')]}]