[Bobby] bought a book for his father [Antonio]. [Louis] and his sister [Marie] went to the park. [Bobby] went to the football game with his uncle [Louis]. [Marie] and her daughter [Elsie] went out to dinner.
('Antonio', 'Elsie')
[Bobby] bought a book for his father [Antonio]. [Bobby] went to the football game with his uncle [Louis]. [Louis] and his sister [Marie] went to the park. [Marie] and her daughter [Elsie] went out to dinner.
[{('Antonio', 'niece', 'Elsie'): [('Antonio', 'sister', 'Marie'), ('Marie', 'daughter', 'Elsie')]}, {('Antonio', 'sister', 'Marie'): [('Antonio', 'brother', 'Louis'), ('Louis', 'sister', 'Marie')]}, {('Antonio', 'brother', 'Louis'): [('Antonio', 'son', 'Bobby'), ('Bobby', 'uncle', 'Louis')]}]
['son', 'uncle', 'sister', 'daughter']