[Irvin]'s mother, [Lena], was too busy to play with him. She was helping her daughter, [Pamela], with her homework. [Frances] took her grandson [Irvin] to see a movie Saturday. They ate popcorn while they were there.
('Frances', 'Pamela')
[Frances] took her grandson [Irvin] to see a movie Saturday. They ate popcorn while they were there. [Irvin]'s mother, [Lena], was too busy to play with him. She was helping her daughter, [Pamela], with her homework.
[{('Frances', 'granddaughter', 'Pamela'): [('Frances', 'grandson', 'Irvin'), ('Irvin', 'sister', 'Pamela')]}, {('Irvin', 'sister', 'Pamela'): [('Irvin', 'mother', 'Lena'), ('Lena', 'daughter', 'Pamela')]}]
['grandson', 'mother', 'daughter']