[Robert] and his brother [Pedro] went to the boxing match. [Beverly] was upset her brother [Robert] did n't invite her. [Elsie] asked her mother, [Marie], if she could take her over to her friend's house. [Marie] was busy, but her sister [Beverly] volunteered to take [Elsie] instead.
('Elsie', 'Pedro')
[Elsie] asked her mother, [Marie], if she could take her over to her friend's house. [Marie] was busy, but her sister [Beverly] volunteered to take [Elsie] instead. [Robert] and his brother [Pedro] went to the boxing match. [Beverly] was upset her brother [Robert] did n't invite her.
[{('Elsie', 'uncle', 'Pedro'): [('Elsie', 'mother', 'Marie'), ('Marie', 'brother', 'Pedro')]}, {('Marie', 'brother', 'Pedro'): [('Marie', 'sister', 'Beverly'), ('Beverly', 'brother', 'Pedro')]}, {('Beverly', 'brother', 'Pedro'): [('Beverly', 'brother', 'Robert'), ('Robert', 'brother', 'Pedro')]}]
['mother', 'sister', 'brother', 'brother']