[Louis] was angry with his brother [Pedro] for forgetting to pick him up from school. [Marie] likes to make mini pies for her niece, [Cheryl]. [Rebecca] and her sister [Cheryl] went out to eat with [Rebecca]'s father, [Pedro].
('Louis', 'Marie')
[Louis] was angry with his brother [Pedro] for forgetting to pick him up from school. [Rebecca] and her sister [Cheryl] went out to eat with [Rebecca]'s father, [Pedro]. [Marie] likes to make mini pies for her niece, [Cheryl].
[{('Louis', 'sister', 'Marie'): [('Louis', 'brother', 'Pedro'), ('Pedro', 'sister', 'Marie')]}, {('Pedro', 'sister', 'Marie'): [('Pedro', 'daughter', 'Cheryl'), ('Cheryl', 'aunt', 'Marie')]}, {('Pedro', 'daughter', 'Cheryl'): [('Pedro', 'daughter', 'Rebecca'), ('Rebecca', 'sister', 'Cheryl')]}]
['brother', 'daughter', 'sister', 'aunt']