[Cindy] likes taking her son [Leonard] to school. [Leonard] and his brother [Pete] took [Pete]'s grandfather [James] to the store to get groceries.
('Cindy', 'James')
[Cindy] likes taking her son [Leonard] to school. [Leonard] and his brother [Pete] took [Pete]'s grandfather [James] to the store to get groceries.
[{('Cindy', 'father', 'James'): [('Cindy', 'son', 'Leonard'), ('Leonard', 'grandfather', 'James')]}, {('Leonard', 'grandfather', 'James'): [('Leonard', 'brother', 'Pete'), ('Pete', 'grandfather', 'James')]}]
['son', 'brother', 'grandfather']