[Marie] read her son [Ronald] a bedtime story every night. [Robert]'s son, [Ronald] and sister [Dorothy] went biking by the coast today. [Dorothy]'s daughter, [Rebecca], asked her mom to read her a story.
('Marie', 'Rebecca')
[Marie] read her son [Ronald] a bedtime story every night. [Robert]'s son, [Ronald] and sister [Dorothy] went biking by the coast today. [Dorothy]'s daughter, [Rebecca], asked her mom to read her a story.
[{('Marie', 'niece', 'Rebecca'): [('Marie', 'sister', 'Dorothy'), ('Dorothy', 'daughter', 'Rebecca')]}, {('Marie', 'sister', 'Dorothy'): [('Marie', 'son', 'Ronald'), ('Ronald', 'aunt', 'Dorothy')]}, {('Ronald', 'aunt', 'Dorothy'): [('Ronald', 'father', 'Robert'), ('Robert', 'sister', 'Dorothy')]}]
['son', 'father', 'sister', 'daughter']