[Jennifer] went with her brother [Dennis] to the mall to buy some new candles. [Dennis] bought a book for his father [Nicholas].
('Nicholas', 'Jennifer')
[Dennis] bought a book for his father [Nicholas]. [Jennifer] went with her brother [Dennis] to the mall to buy some new candles.
[{('Nicholas', 'daughter', 'Jennifer'): [('Nicholas', 'son', 'Dennis'), ('Dennis', 'sister', 'Jennifer')]}]
['son', 'sister']