[Ronald] and [Elsie] are married. [Angelica] and her mother [Marie] went to volunteer at the homeless shelter last weekend. [Mario] and his brother [Ronald] went to the boxing match. [Angelica] was upset her brother [Mario] did n't invite her.
('Marie', 'Elsie')
[Angelica] and her mother [Marie] went to volunteer at the homeless shelter last weekend. [Mario] and his brother [Ronald] went to the boxing match. [Angelica] was upset her brother [Mario] did n't invite her. [Ronald] and [Elsie] are married.
[{('Marie', 'daughter-in-law', 'Elsie'): [('Marie', 'son', 'Ronald'), ('Ronald', 'wife', 'Elsie')]}, {('Marie', 'son', 'Ronald'): [('Marie', 'son', 'Mario'), ('Mario', 'brother', 'Ronald')]}, {('Marie', 'son', 'Mario'): [('Marie', 'daughter', 'Angelica'), ('Angelica', 'brother', 'Mario')]}]
['daughter', 'brother', 'brother', 'wife']