[James], his daughter [Lena], and his granddaughter [Pamela] were going out to lunch. [Lena]'s other daughter, [Mildred], could n't make it.
('Mildred', 'James')
[James], his daughter [Lena], and his granddaughter [Pamela] were going out to lunch. [Lena]'s other daughter, [Mildred], could n't make it.
[{('Mildred', 'grandfather', 'James'): [('Mildred', 'sister', 'Pamela'), ('Pamela', 'grandfather', 'James')]}, {('Mildred', 'sister', 'Pamela'): [('Mildred', 'mother', 'Lena'), ('Lena', 'daughter', 'Pamela')]}]
['mother', 'daughter', 'grandfather']