[Pedro] and his sister [Marie] walked to school together every day, since they only lived two blocks away from the school. [Tracy]'s sister, [Marie], recently started acting. [Tracy]'s daughter, [Laura], just graduated high school. [Laura] was pleased to receive a birthday card from her grandmother, [Shantel].
('Pedro', 'Shantel')
[Pedro] and his sister [Marie] walked to school together every day, since they only lived two blocks away from the school. [Tracy]'s sister, [Marie], recently started acting. [Tracy]'s daughter, [Laura], just graduated high school. [Laura] was pleased to receive a birthday card from her grandmother, [Shantel].
[{('Pedro', 'mother', 'Shantel'): [('Pedro', 'sister', 'Tracy'), ('Tracy', 'mother', 'Shantel')]}, {('Pedro', 'sister', 'Tracy'): [('Pedro', 'sister', 'Marie'), ('Marie', 'sister', 'Tracy')]}, {('Tracy', 'mother', 'Shantel'): [('Tracy', 'daughter', 'Laura'), ('Laura', 'grandmother', 'Shantel')]}]
['sister', 'sister', 'daughter', 'grandmother']