[Nicholas] and his wife [Amy] are picking up [Nicholas]'s son [Emily] from her first day of school.
('Amy', 'Emily')
[Nicholas] and his wife [Amy] are picking up [Nicholas]'s son [Emily] from her first day of school.
[{('Amy', 'daughter', 'Emily'): [('Amy', 'husband', 'Nicholas'), ('Nicholas', 'daughter', 'Emily')]}]
['husband', 'daughter']