[Wesley] took his daughter [Pamela] to see her grandfather [James] after school yesterday. [Martha] bought some shoes for her father [Wesley].
('Martha', 'James')
[Martha] bought some shoes for her father [Wesley]. [Wesley] took his daughter [Pamela] to see her grandfather [James] after school yesterday.
[{('Martha', 'grandfather', 'James'): [('Martha', 'father', 'Wesley'), ('Wesley', 'father', 'James')]}, {('Wesley', 'father', 'James'): [('Wesley', 'daughter', 'Pamela'), ('Pamela', 'grandfather', 'James')]}]
['father', 'daughter', 'grandfather']