[Robert] treated his father [Harold] and sister [Beverly] to a fancy dinner. [Nettie] and her sister [Karen] were playing outside. [Nettie]'s mother [Beverly] called for her to come inside.
('Karen', 'Harold')
[Nettie] and her sister [Karen] were playing outside. [Nettie]'s mother [Beverly] called for her to come inside. [Robert] treated his father [Harold] and sister [Beverly] to a fancy dinner.
[{('Karen', 'grandfather', 'Harold'): [('Karen', 'mother', 'Beverly'), ('Beverly', 'father', 'Harold')]}, {('Karen', 'mother', 'Beverly'): [('Karen', 'sister', 'Nettie'), ('Nettie', 'mother', 'Beverly')]}, {('Beverly', 'father', 'Harold'): [('Beverly', 'brother', 'Robert'), ('Robert', 'father', 'Harold')]}]
['sister', 'mother', 'brother', 'father']