[Robert] and his mother, [Nancy], drove to the elementary school. [Nancy]'s daughter, [Louise], had finished her first day, and they wanted to pick her up, and see how her day had been.
('Robert', 'Louise')
[Robert] and his mother, [Nancy], drove to the elementary school. [Nancy]'s daughter, [Louise], had finished her first day, and they wanted to pick her up, and see how her day had been.
[{('Robert', 'sister', 'Louise'): [('Robert', 'mother', 'Nancy'), ('Nancy', 'daughter', 'Louise')]}]
['mother', 'daughter']