[Michelle] and her sister [Lizzie] went out to eat with [Michelle]'s father, [Robert]. [Harold] 'son [Robert] could not believe that his father bought him a coffee machine for his birthday. [Antonio], [Lizzie]'s uncle, recently got into fishing.
('Harold', 'Antonio')
[Harold] 'son [Robert] could not believe that his father bought him a coffee machine for his birthday. [Michelle] and her sister [Lizzie] went out to eat with [Michelle]'s father, [Robert]. [Antonio], [Lizzie]'s uncle, recently got into fishing.
[{('Harold', 'son', 'Antonio'): [('Harold', 'son', 'Robert'), ('Robert', 'brother', 'Antonio')]}, {('Robert', 'brother', 'Antonio'): [('Robert', 'daughter', 'Lizzie'), ('Lizzie', 'uncle', 'Antonio')]}, {('Robert', 'daughter', 'Lizzie'): [('Robert', 'daughter', 'Michelle'), ('Michelle', 'sister', 'Lizzie')]}]
['son', 'daughter', 'sister', 'uncle']