[Beverly]'s first born, [Paul] grew to hate his sister, [Karen]. [Beverly] was playing hide-and-seek with her sister [Marie]. [Tracy] and her sister [Marie] braided each other's hair before school.
('Karen', 'Tracy')
[Beverly]'s first born, [Paul] grew to hate his sister, [Karen]. [Beverly] was playing hide-and-seek with her sister [Marie]. [Tracy] and her sister [Marie] braided each other's hair before school.
[{('Karen', 'aunt', 'Tracy'): [('Karen', 'mother', 'Beverly'), ('Beverly', 'sister', 'Tracy')]}, {('Karen', 'mother', 'Beverly'): [('Karen', 'brother', 'Paul'), ('Paul', 'mother', 'Beverly')]}, {('Beverly', 'sister', 'Tracy'): [('Beverly', 'sister', 'Marie'), ('Marie', 'sister', 'Tracy')]}]
['brother', 'mother', 'sister', 'sister']