[Lizzie] and her mother [Marie] attended a play at the theater. [Pedro] and his nephew [John] went hunting together last weekend. [Louis] and his sister [Marie] love to play video games. [Lizzie] and her brother [John] were having a wonderful time at Disneyland.
('Louis', 'Pedro')
[Louis] and his sister [Marie] love to play video games. [Lizzie] and her mother [Marie] attended a play at the theater. [Lizzie] and her brother [John] were having a wonderful time at Disneyland. [Pedro] and his nephew [John] went hunting together last weekend.
[{('Louis', 'brother', 'Pedro'): [('Louis', 'sister', 'Marie'), ('Marie', 'brother', 'Pedro')]}, {('Marie', 'brother', 'Pedro'): [('Marie', 'son', 'John'), ('John', 'uncle', 'Pedro')]}, {('Marie', 'son', 'John'): [('Marie', 'daughter', 'Lizzie'), ('Lizzie', 'brother', 'John')]}]
['sister', 'daughter', 'brother', 'uncle']