[Tracy] and [Louis] have a brother named [Robert] [Robert] took his daughter [Elsie] to school Monday. [Elsie]'s sister [Michelle] was already there because she got a ride with one of her friends.
('Louis', 'Michelle')
[Tracy] and [Louis] have a brother named [Robert] [Robert] took his daughter [Elsie] to school Monday. [Elsie]'s sister [Michelle] was already there because she got a ride with one of her friends.
[{('Louis', 'niece', 'Michelle'): [('Louis', 'brother', 'Robert'), ('Robert', 'daughter', 'Michelle')]}, {('Robert', 'daughter', 'Michelle'): [('Robert', 'daughter', 'Elsie'), ('Elsie', 'sister', 'Michelle')]}, {('Louis', 'brother', 'Robert'): [('Louis', 'sister', 'Tracy'), ('Tracy', 'brother', 'Robert')]}]
['sister', 'brother', 'daughter', 'sister']