[Erika] babysat her little brother [Aaron], while their mother [Tracy] visited her sister [Beverly]. [Harold] and his daughter, [Beverly] had tea.
('Aaron', 'Harold')
[Erika] babysat her little brother [Aaron], while their mother [Tracy] visited her sister [Beverly]. [Harold] and his daughter, [Beverly] had tea.
[{('Aaron', 'grandfather', 'Harold'): [('Aaron', 'mother', 'Tracy'), ('Tracy', 'father', 'Harold')]}, {('Tracy', 'father', 'Harold'): [('Tracy', 'sister', 'Beverly'), ('Beverly', 'father', 'Harold')]}, {('Aaron', 'mother', 'Tracy'): [('Aaron', 'sister', 'Erika'), ('Erika', 'mother', 'Tracy')]}]
['sister', 'mother', 'sister', 'father']