[Louis] and his sister [Tracy] went to brunch today at the new diner. [Louis] met his brother [Pedro] for drinks after work. [Louis] and his sister [Tracy] are going for a walk. [Robert] love his brother [Pedro]. They are always playing together.
('Louis', 'Robert')
[Louis] and his sister [Tracy] are going for a walk. [Louis] and his sister [Tracy] went to brunch today at the new diner. [Louis] met his brother [Pedro] for drinks after work. [Robert] love his brother [Pedro]. They are always playing together.
[{('Louis', 'brother', 'Robert'): [('Louis', 'sister', 'Tracy'), ('Tracy', 'brother', 'Robert')]}, {('Tracy', 'brother', 'Robert'): [('Tracy', 'brother', 'Pedro'), ('Pedro', 'brother', 'Robert')]}, {('Tracy', 'brother', 'Pedro'): [('Tracy', 'brother', 'Louis'), ('Louis', 'brother', 'Pedro')]}]
['sister', 'brother', 'brother', 'brother']