[Michelle]'s brother [John] and her went to get ice cream. [Louis] and his sister [Dorothy] went to the park. [Dorothy] and her sister [Marie] went to the movies. [Marie]'s son [John] stayed home with a cold.
('Louis', 'Michelle')
[Louis] and his sister [Dorothy] went to the park. [Dorothy] and her sister [Marie] went to the movies. [Marie]'s son [John] stayed home with a cold. [Michelle]'s brother [John] and her went to get ice cream.
[{('Louis', 'niece', 'Michelle'): [('Louis', 'sister', 'Marie'), ('Marie', 'daughter', 'Michelle')]}, {('Marie', 'daughter', 'Michelle'): [('Marie', 'son', 'John'), ('John', 'sister', 'Michelle')]}, {('Louis', 'sister', 'Marie'): [('Louis', 'sister', 'Dorothy'), ('Dorothy', 'sister', 'Marie')]}]
['sister', 'sister', 'son', 'sister']