[Marie] visited her son [Ronald] at college. [Marie] and her brother [Pedro] went to the diner to eat yummy food together. [Robert] and his father, [Harold], were having a disagreement, so they asked [Ronald], [Robert]'s son, to settle it for them.
('Pedro', 'Harold')
[Marie] and her brother [Pedro] went to the diner to eat yummy food together. [Marie] visited her son [Ronald] at college. [Robert] and his father, [Harold], were having a disagreement, so they asked [Ronald], [Robert]'s son, to settle it for them.
[{('Pedro', 'father', 'Harold'): [('Pedro', 'sister', 'Marie'), ('Marie', 'father', 'Harold')]}, {('Marie', 'father', 'Harold'): [('Marie', 'son', 'Ronald'), ('Ronald', 'grandfather', 'Harold')]}, {('Ronald', 'grandfather', 'Harold'): [('Ronald', 'father', 'Robert'), ('Robert', 'father', 'Harold')]}]
['sister', 'son', 'father', 'father']