[Ronald] and his sister [Angelica] went to brunch today at the new diner. [Robert] and his father, [Harold], were having a disagreement, so they asked [Mario], [Robert]'s son, to settle it for them. [Ronald] went to the baseball game with his brother [Mario].
('Angelica', 'Harold')
[Ronald] and his sister [Angelica] went to brunch today at the new diner. [Ronald] went to the baseball game with his brother [Mario]. [Robert] and his father, [Harold], were having a disagreement, so they asked [Mario], [Robert]'s son, to settle it for them.
[{('Angelica', 'grandfather', 'Harold'): [('Angelica', 'brother', 'Mario'), ('Mario', 'grandfather', 'Harold')]}, {('Angelica', 'brother', 'Mario'): [('Angelica', 'brother', 'Ronald'), ('Ronald', 'brother', 'Mario')]}, {('Mario', 'grandfather', 'Harold'): [('Mario', 'father', 'Robert'), ('Robert', 'father', 'Harold')]}]
['brother', 'brother', 'father', 'father']