[Amy] walked to the park with her son [Michael]. [Michael]'s wife [Jennifer] was at the park waiting for them.
('Jennifer', 'Amy')
[Amy] walked to the park with her son [Michael]. [Michael]'s wife [Jennifer] was at the park waiting for them.
[{('Jennifer', 'mother-in-law', 'Amy'): [('Jennifer', 'husband', 'Michael'), ('Michael', 'mother', 'Amy')]}]
['husband', 'mother']