[Beverly] and her sister [Dorothy], went to visit [Beverly]'s son [Samuel] at his new apartment. [Samuel] was n't there, but his brother [Paul] was, and he let the women in. [Paul] invited his Aunt [Marie] to come to his graduation party.
('Dorothy', 'Marie')
[Beverly] and her sister [Dorothy], went to visit [Beverly]'s son [Samuel] at his new apartment. [Samuel] was n't there, but his brother [Paul] was, and he let the women in. [Paul] invited his Aunt [Marie] to come to his graduation party.
[{('Dorothy', 'sister', 'Marie'): [('Dorothy', 'sister', 'Beverly'), ('Beverly', 'sister', 'Marie')]}, {('Beverly', 'sister', 'Marie'): [('Beverly', 'son', 'Paul'), ('Paul', 'aunt', 'Marie')]}, {('Beverly', 'son', 'Paul'): [('Beverly', 'son', 'Samuel'), ('Samuel', 'brother', 'Paul')]}]
['sister', 'son', 'brother', 'aunt']