[Louis] took his sisters [Marie] and [Dorothy] on a hiking trip last weekend. [Elsie] has a lovely sister named [Michelle] and [Elsie]'s mother is [Marie]
('Dorothy', 'Michelle')
[Louis] took his sisters [Marie] and [Dorothy] on a hiking trip last weekend. [Elsie] has a lovely sister named [Michelle] and [Elsie]'s mother is [Marie]
[{('Dorothy', 'niece', 'Michelle'): [('Dorothy', 'sister', 'Marie'), ('Marie', 'daughter', 'Michelle')]}, {('Dorothy', 'sister', 'Marie'): [('Dorothy', 'brother', 'Louis'), ('Louis', 'sister', 'Marie')]}, {('Marie', 'daughter', 'Michelle'): [('Marie', 'daughter', 'Elsie'), ('Elsie', 'sister', 'Michelle')]}]
['brother', 'sister', 'daughter', 'sister']