[Michael] was delayed picking up his sister, [Mary], from class. Thankfully, [Amy]'s mom, [Mary], was already there.
('Michael', 'Amy')
[Michael] was delayed picking up his sister, [Mary], from class. Thankfully, [Amy]'s mom, [Mary], was already there.
[{('Michael', 'mother', 'Amy'): [('Michael', 'sister', 'Mary'), ('Mary', 'mother', 'Amy')]}]
['sister', 'mother']