[Marie] and her sister [Tracy] played golf together. [Marie] won easily. [Lizzie] really enjoys visiting her grandfather [Harold]. [Tracy] is a sister of [Louis]. [Marie]'s daughter, [Lizzie], just graduated high school.
('Louis', 'Harold')
[Tracy] is a sister of [Louis]. [Marie] and her sister [Tracy] played golf together. [Marie] won easily. [Marie]'s daughter, [Lizzie], just graduated high school. [Lizzie] really enjoys visiting her grandfather [Harold].
[{('Louis', 'father', 'Harold'): [('Louis', 'sister', 'Marie'), ('Marie', 'father', 'Harold')]}, {('Marie', 'father', 'Harold'): [('Marie', 'daughter', 'Lizzie'), ('Lizzie', 'grandfather', 'Harold')]}, {('Louis', 'sister', 'Marie'): [('Louis', 'sister', 'Tracy'), ('Tracy', 'sister', 'Marie')]}]
['sister', 'sister', 'daughter', 'grandfather']