[Mary] went with her brother [Glen] to the mall to buy some new candles. [Nicholas] went on a roadtrip with his youngest child, [Glen].
('Nicholas', 'Mary')
[Nicholas] went on a roadtrip with his youngest child, [Glen]. [Mary] went with her brother [Glen] to the mall to buy some new candles.
[{('Nicholas', 'daughter', 'Mary'): [('Nicholas', 'son', 'Glen'), ('Glen', 'sister', 'Mary')]}]
['son', 'sister']