[Robert] bought a book for his father [Wayne]. [Ashley] bought a present for her grandson [Robert]
('Wayne', 'Ashley')
[Robert] bought a book for his father [Wayne]. [Ashley] bought a present for her grandson [Robert]
[{('Wayne', 'mother', 'Ashley'): [('Wayne', 'son', 'Robert'), ('Robert', 'grandmother', 'Ashley')]}]
['son', 'grandmother']