[Mary] loves seeing her son [Herman] on Mother's Day. [Herman] is bringing his son [James] this year.
('James', 'Mary')
[Mary] loves seeing her son [Herman] on Mother's Day. [Herman] is bringing his son [James] this year.
[{('James', 'grandmother', 'Mary'): [('James', 'father', 'Herman'), ('Herman', 'mother', 'Mary')]}]