[Louis] went on a roadtrip with his youngest child, [Samuel]. [Marie] and her brother [Pedro] went to the movies together. [Samuel] was happy to see his aunt [Tracy]. [Tracy]'s brother [Pedro] was going to be the star in the new show.
('Louis', 'Marie')
[Louis] went on a roadtrip with his youngest child, [Samuel]. [Samuel] was happy to see his aunt [Tracy]. [Tracy]'s brother [Pedro] was going to be the star in the new show. [Marie] and her brother [Pedro] went to the movies together.
[{('Louis', 'sister', 'Marie'): [('Louis', 'brother', 'Pedro'), ('Pedro', 'sister', 'Marie')]}, {('Louis', 'brother', 'Pedro'): [('Louis', 'sister', 'Tracy'), ('Tracy', 'brother', 'Pedro')]}, {('Louis', 'sister', 'Tracy'): [('Louis', 'son', 'Samuel'), ('Samuel', 'aunt', 'Tracy')]}]
['son', 'aunt', 'brother', 'sister']