[Pedro] bought his brother [Antonio] a present. It was to congratulate him on becoming a father to his new son, [Bettie]. [Bobby] took his mom [Tracy] and sister [Bettie] to the movies.
('Tracy', 'Pedro')
[Bobby] took his mom [Tracy] and sister [Bettie] to the movies. [Pedro] bought his brother [Antonio] a present. It was to congratulate him on becoming a father to his new son, [Bettie].
[{('Tracy', 'brother', 'Pedro'): [('Tracy', 'son', 'Bobby'), ('Bobby', 'uncle', 'Pedro')]}, {('Bobby', 'uncle', 'Pedro'): [('Bobby', 'father', 'Antonio'), ('Antonio', 'brother', 'Pedro')]}, {('Bobby', 'father', 'Antonio'): [('Bobby', 'sister', 'Bettie'), ('Bettie', 'father', 'Antonio')]}]
['son', 'sister', 'father', 'brother']