[Milton] and his wife [Mary] went rock-climbing this weekend. [Amy] took her daughter [Mary] to see her very first ballet performance.
('Milton', 'Amy')
[Milton] and his wife [Mary] went rock-climbing this weekend. [Amy] took her daughter [Mary] to see her very first ballet performance.
[{('Milton', 'mother-in-law', 'Amy'): [('Milton', 'wife', 'Mary'), ('Mary', 'mother', 'Amy')]}]
['wife', 'mother']