[Ronald] and his son [Robert] are playing a father-son game of basketball. [Allan] is waiting to go to dinner with his dad [Robert]. [Harold] is the proud grandfather of the cute [Ronald]. [Allan] is the great brother of [Mario].
('Mario', 'Harold')
[Allan] is the great brother of [Mario]. [Ronald] and his son [Robert] are playing a father-son game of basketball. [Allan] is waiting to go to dinner with his dad [Robert]. [Harold] is the proud grandfather of the cute [Ronald].
[{('Mario', 'grandfather', 'Harold'): [('Mario', 'brother', 'Allan'), ('Allan', 'grandfather', 'Harold')]}, {('Allan', 'grandfather', 'Harold'): [('Allan', 'father', 'Robert'), ('Robert', 'father', 'Harold')]}, {('Robert', 'father', 'Harold'): [('Robert', 'son', 'Ronald'), ('Ronald', 'grandfather', 'Harold')]}]
['brother', 'father', 'son', 'grandfather']