[Nancy] took her daughter [Linda] to school, then she went shopping with her brother [Nicholas].
('Nicholas', 'Linda')
[Nancy] took her daughter [Linda] to school, then she went shopping with her brother [Nicholas].
[{('Nicholas', 'niece', 'Linda'): [('Nicholas', 'sister', 'Nancy'), ('Nancy', 'daughter', 'Linda')]}]
['sister', 'daughter']