[Beverly] took her sister [Tracy] out for dinner to celebrate her birthday. [Louis] liked to talk about his sister, [Marie]. [Harold] was proud of his son, [Louis]. [Tracy] was sewing a sweater for her sister [Marie].
('Harold', 'Beverly')
[Harold] was proud of his son, [Louis]. [Louis] liked to talk about his sister, [Marie]. [Tracy] was sewing a sweater for her sister [Marie]. [Beverly] took her sister [Tracy] out for dinner to celebrate her birthday.
[{('Harold', 'daughter', 'Beverly'): [('Harold', 'daughter', 'Tracy'), ('Tracy', 'sister', 'Beverly')]}, {('Harold', 'daughter', 'Tracy'): [('Harold', 'son', 'Louis'), ('Louis', 'sister', 'Tracy')]}, {('Louis', 'sister', 'Tracy'): [('Louis', 'sister', 'Marie'), ('Marie', 'sister', 'Tracy')]}]
['son', 'sister', 'sister', 'sister']