[Cheryl]'s brother [Jeffrey] and her went to get ice cream. [Louis] always enjoyed playing with his sister, [Marie], when they were growing up. [Dorothy] went out to lunch with her sister [Marie] and her son [Jeffrey].
('Louis', 'Cheryl')
[Louis] always enjoyed playing with his sister, [Marie], when they were growing up. [Dorothy] went out to lunch with her sister [Marie] and her son [Jeffrey]. [Cheryl]'s brother [Jeffrey] and her went to get ice cream.
[{('Louis', 'niece', 'Cheryl'): [('Louis', 'sister', 'Dorothy'), ('Dorothy', 'daughter', 'Cheryl')]}, {('Dorothy', 'daughter', 'Cheryl'): [('Dorothy', 'son', 'Jeffrey'), ('Jeffrey', 'sister', 'Cheryl')]}, {('Louis', 'sister', 'Dorothy'): [('Louis', 'sister', 'Marie'), ('Marie', 'sister', 'Dorothy')]}]
['sister', 'sister', 'son', 'sister']