[Amy] went shopping with her son. His name is [Milton]. [Theresa] is a woman with a sister named [Amy].
('Milton', 'Theresa')
[Amy] went shopping with her son. His name is [Milton]. [Theresa] is a woman with a sister named [Amy].
[{('Milton', 'aunt', 'Theresa'): [('Milton', 'mother', 'Amy'), ('Amy', 'sister', 'Theresa')]}]
['mother', 'sister']