[Louis]'s wife [Beverly] and his son [Michael] went to the store with [Beverly]'s brother, [Robert]. [Michael] was the nephew of a man named [Pedro].
('Robert', 'Pedro')
[Louis]'s wife [Beverly] and his son [Michael] went to the store with [Beverly]'s brother, [Robert]. [Michael] was the nephew of a man named [Pedro].
[{('Robert', 'brother', 'Pedro'): [('Robert', 'sister', 'Beverly'), ('Beverly', 'brother', 'Pedro')]}, {('Beverly', 'brother', 'Pedro'): [('Beverly', 'son', 'Michael'), ('Michael', 'uncle', 'Pedro')]}, {('Beverly', 'son', 'Michael'): [('Beverly', 'husband', 'Louis'), ('Louis', 'son', 'Michael')]}]
['sister', 'husband', 'son', 'uncle']