[Louis] and [Beverly] are married. [Beverly] visited her son [Michael] at college. [Pedro] and his sister [Tracy] stood in line at the fair. [Michael] brought his mother to see her sister [Tracy].
('Louis', 'Pedro')
[Louis] and [Beverly] are married. [Beverly] visited her son [Michael] at college. [Michael] brought his mother to see her sister [Tracy]. [Pedro] and his sister [Tracy] stood in line at the fair.
[{('Louis', 'brother', 'Pedro'): [('Louis', 'sister', 'Tracy'), ('Tracy', 'brother', 'Pedro')]}, {('Louis', 'sister', 'Tracy'): [('Louis', 'son', 'Michael'), ('Michael', 'aunt', 'Tracy')]}, {('Louis', 'son', 'Michael'): [('Louis', 'wife', 'Beverly'), ('Beverly', 'son', 'Michael')]}]
['wife', 'son', 'aunt', 'brother']