[Mario] and his brother [Ronald] had a fight. They did n't speak to each other for a whole week afterwards. [Ronald]'s brother, [Mario], recently got elected as a senator. [Ronald]'s sister [Lizzie] asked him for some help planting her garden. [Shantel] kept her grandson [Ronald] last weekend so his parents could go to a concert.
('Lizzie', 'Shantel')
[Ronald]'s sister [Lizzie] asked him for some help planting her garden. [Mario] and his brother [Ronald] had a fight. They did n't speak to each other for a whole week afterwards. [Ronald]'s brother, [Mario], recently got elected as a senator. [Shantel] kept her grandson [Ronald] last weekend so his parents could go to a concert.
[{('Lizzie', 'grandmother', 'Shantel'): [('Lizzie', 'brother', 'Mario'), ('Mario', 'grandmother', 'Shantel')]}, {('Mario', 'grandmother', 'Shantel'): [('Mario', 'brother', 'Ronald'), ('Ronald', 'grandmother', 'Shantel')]}, {('Lizzie', 'brother', 'Mario'): [('Lizzie', 'brother', 'Ronald'), ('Ronald', 'brother', 'Mario')]}]
['brother', 'brother', 'brother', 'grandmother']