[Robert] was proud of his son, [Ronald]. [Mario] and his brother [Ronald] decided to play paintball on Saturday. [Marie] picked up her son [Mario] from the mall [Harold] is the loving father of his wonderful child [Marie]. [Marie] loves [Harold].
('Robert', 'Harold')
[Robert] was proud of his son, [Ronald]. [Mario] and his brother [Ronald] decided to play paintball on Saturday. [Marie] picked up her son [Mario] from the mall [Harold] is the loving father of his wonderful child [Marie]. [Marie] loves [Harold].
[{('Robert', 'father', 'Harold'): [('Robert', 'son', 'Mario'), ('Mario', 'grandfather', 'Harold')]}, {('Mario', 'grandfather', 'Harold'): [('Mario', 'mother', 'Marie'), ('Marie', 'father', 'Harold')]}, {('Robert', 'son', 'Mario'): [('Robert', 'son', 'Ronald'), ('Ronald', 'brother', 'Mario')]}]
['son', 'brother', 'mother', 'father']