[Roberto]'s mother, [Dorothy], was calling him for dinner. [Louis]'s dad [Harold] is the CEO of the company. [Dorothy] was playing in the sandbox with her brother [Antonio]. [Louis] love his brother [Antonio]. They are always playing together.
('Roberto', 'Harold')
[Roberto]'s mother, [Dorothy], was calling him for dinner. [Dorothy] was playing in the sandbox with her brother [Antonio]. [Louis] love his brother [Antonio]. They are always playing together. [Louis]'s dad [Harold] is the CEO of the company.
[{('Roberto', 'grandfather', 'Harold'): [('Roberto', 'mother', 'Dorothy'), ('Dorothy', 'father', 'Harold')]}, {('Dorothy', 'father', 'Harold'): [('Dorothy', 'brother', 'Louis'), ('Louis', 'father', 'Harold')]}, {('Dorothy', 'brother', 'Louis'): [('Dorothy', 'brother', 'Antonio'), ('Antonio', 'brother', 'Louis')]}]
['mother', 'brother', 'brother', 'father']