[Irvin] waited patiently on his mother [Lena]. When she did n't show up he called her daughter [Pamela] for help. [Frances] took her grandson [Pamela] to the zoo. He loved feeding the monkeys.
('Irvin', 'Frances')
[Irvin] waited patiently on his mother [Lena]. When she did n't show up he called her daughter [Pamela] for help. [Frances] took her grandson [Pamela] to the zoo. He loved feeding the monkeys.
[{('Irvin', 'grandmother', 'Frances'): [('Irvin', 'sister', 'Pamela'), ('Pamela', 'grandmother', 'Frances')]}, {('Irvin', 'sister', 'Pamela'): [('Irvin', 'mother', 'Lena'), ('Lena', 'daughter', 'Pamela')]}]
['mother', 'daughter', 'grandmother']