[Pamela]'s brother [Irvin] was going to be the star in the new show. [Mildred] went to visit his grandmother, [Frances], at the nursing home. She was grateful for the company, she had n't had a family visit in months. [Mildred] and her brother [Irvin] went to the basketball game and had a great time.
('Pamela', 'Frances')
[Pamela]'s brother [Irvin] was going to be the star in the new show. [Mildred] and her brother [Irvin] went to the basketball game and had a great time. [Mildred] went to visit his grandmother, [Frances], at the nursing home. She was grateful for the company, she had n't had a family visit in months.
[{('Pamela', 'grandmother', 'Frances'): [('Pamela', 'brother', 'Irvin'), ('Irvin', 'grandmother', 'Frances')]}, {('Irvin', 'grandmother', 'Frances'): [('Irvin', 'sister', 'Mildred'), ('Mildred', 'grandmother', 'Frances')]}]
['brother', 'sister', 'grandmother']