[Elsie] and her mother [Marie] went out to eat. [Marie]'s sister, [Beverly], went with them. [Tracy] needed to go to the store. [Tracy] asked her sister [Beverly] for a ride. [Tracy] went out for pizza with her father [Harold].
('Elsie', 'Harold')
[Elsie] and her mother [Marie] went out to eat. [Marie]'s sister, [Beverly], went with them. [Tracy] needed to go to the store. [Tracy] asked her sister [Beverly] for a ride. [Tracy] went out for pizza with her father [Harold].
[{('Elsie', 'grandfather', 'Harold'): [('Elsie', 'mother', 'Marie'), ('Marie', 'father', 'Harold')]}, {('Marie', 'father', 'Harold'): [('Marie', 'sister', 'Beverly'), ('Beverly', 'father', 'Harold')]}, {('Beverly', 'father', 'Harold'): [('Beverly', 'sister', 'Tracy'), ('Tracy', 'father', 'Harold')]}]
['mother', 'sister', 'sister', 'father']