[Frances] invited her son [Wesley] and granddaughter [Mildred] to the party. [Mildred]'s brother [Irvin] had already made other plans.
('Irvin', 'Frances')
[Frances] invited her son [Wesley] and granddaughter [Mildred] to the party. [Mildred]'s brother [Irvin] had already made other plans.
[{('Irvin', 'grandmother', 'Frances'): [('Irvin', 'father', 'Wesley'), ('Wesley', 'mother', 'Frances')]}, {('Irvin', 'father', 'Wesley'): [('Irvin', 'sister', 'Mildred'), ('Mildred', 'father', 'Wesley')]}]
['sister', 'father', 'mother']