[Antonio] took his daughter [Bettie] to dinner, [Erika], [Bettie]'s sister stayed home. [Pedro] wants to throw a surprise party for his brother [Antonio]. [Pedro]'s brother [Robert] helps pick the decorations.
('Robert', 'Erika')
[Pedro] wants to throw a surprise party for his brother [Antonio]. [Pedro]'s brother [Robert] helps pick the decorations. [Antonio] took his daughter [Bettie] to dinner, [Erika], [Bettie]'s sister stayed home.
[{('Robert', 'niece', 'Erika'): [('Robert', 'brother', 'Antonio'), ('Antonio', 'daughter', 'Erika')]}, {('Antonio', 'daughter', 'Erika'): [('Antonio', 'daughter', 'Bettie'), ('Bettie', 'sister', 'Erika')]}, {('Robert', 'brother', 'Antonio'): [('Robert', 'brother', 'Pedro'), ('Pedro', 'brother', 'Antonio')]}]
['brother', 'brother', 'daughter', 'sister']