[Nettie] went to lunch with her sister [Karen] and her brother [Samuel]. [Samuel] was sad his mother [Beverly] could n't join them. [Marie] and her sister [Beverly] braided each other's hair before school.
('Karen', 'Marie')
[Nettie] went to lunch with her sister [Karen] and her brother [Samuel]. [Samuel] was sad his mother [Beverly] could n't join them. [Marie] and her sister [Beverly] braided each other's hair before school.
[{('Karen', 'aunt', 'Marie'): [('Karen', 'mother', 'Beverly'), ('Beverly', 'sister', 'Marie')]}, {('Karen', 'mother', 'Beverly'): [('Karen', 'brother', 'Samuel'), ('Samuel', 'mother', 'Beverly')]}, {('Karen', 'brother', 'Samuel'): [('Karen', 'sister', 'Nettie'), ('Nettie', 'brother', 'Samuel')]}]
['sister', 'brother', 'mother', 'sister']