[Antonio] and his brother [Louis] just talked on the phone for the first time in years. [Harold] went bike riding his grandson [Mario]. [Mario]'s father [Robert] was skateboarding. [Antonio] played catch with his dad, [Harold]
('Robert', 'Louis')
[Harold] went bike riding his grandson [Mario]. [Mario]'s father [Robert] was skateboarding. [Antonio] played catch with his dad, [Harold] [Antonio] and his brother [Louis] just talked on the phone for the first time in years.
[{('Robert', 'brother', 'Louis'): [('Robert', 'father', 'Harold'), ('Harold', 'son', 'Louis')]}, {('Robert', 'father', 'Harold'): [('Robert', 'son', 'Mario'), ('Mario', 'grandfather', 'Harold')]}, {('Harold', 'son', 'Louis'): [('Harold', 'son', 'Antonio'), ('Antonio', 'brother', 'Louis')]}]
['son', 'grandfather', 'son', 'brother']