[Jennifer] called her mother [Amy] to let her know she will be back home soon. [Milton] often goes out for lunch with his sister, [Jennifer].
('Milton', 'Amy')
[Milton] often goes out for lunch with his sister, [Jennifer]. [Jennifer] called her mother [Amy] to let her know she will be back home soon.
[{('Milton', 'mother', 'Amy'): [('Milton', 'sister', 'Jennifer'), ('Jennifer', 'mother', 'Amy')]}]
['sister', 'mother']