[Robert] and his brother [Pedro] went to the boxing match. [Beverly] was upset her brother [Robert] did n't invite her. [Tracy] took her son, [Bernardo], to the movie theater for his birthday. [Bernardo] invited his Aunt [Beverly] to come to his graduation party.
('Tracy', 'Pedro')
[Tracy] took her son, [Bernardo], to the movie theater for his birthday. [Bernardo] invited his Aunt [Beverly] to come to his graduation party. [Robert] and his brother [Pedro] went to the boxing match. [Beverly] was upset her brother [Robert] did n't invite her.
[{('Tracy', 'brother', 'Pedro'): [('Tracy', 'sister', 'Beverly'), ('Beverly', 'brother', 'Pedro')]}, {('Beverly', 'brother', 'Pedro'): [('Beverly', 'brother', 'Robert'), ('Robert', 'brother', 'Pedro')]}, {('Tracy', 'sister', 'Beverly'): [('Tracy', 'son', 'Bernardo'), ('Bernardo', 'aunt', 'Beverly')]}]
['son', 'aunt', 'brother', 'brother']