[Martha] is a woman with a sister named [Pamela]. [Martha] and her father [Wesley] love to go skiing. Often, [Wesley] will invite his mother [Frances] to join them.
('Pamela', 'Frances')
[Martha] is a woman with a sister named [Pamela]. [Martha] and her father [Wesley] love to go skiing. Often, [Wesley] will invite his mother [Frances] to join them.
[{('Pamela', 'grandmother', 'Frances'): [('Pamela', 'father', 'Wesley'), ('Wesley', 'mother', 'Frances')]}, {('Pamela', 'father', 'Wesley'): [('Pamela', 'sister', 'Martha'), ('Martha', 'father', 'Wesley')]}]
['sister', 'father', 'mother']