[Louis] and his sister [Dorothy] were hoping for a snow day. [Dorothy] made nachos for her daughter [Rebecca] and son [Roberto]. [Roberto]'s brother [Jeffrey] ate tacos instead.
('Louis', 'Jeffrey')
[Louis] and his sister [Dorothy] were hoping for a snow day. [Dorothy] made nachos for her daughter [Rebecca] and son [Roberto]. [Roberto]'s brother [Jeffrey] ate tacos instead.
[{('Louis', 'nephew', 'Jeffrey'): [('Louis', 'sister', 'Dorothy'), ('Dorothy', 'son', 'Jeffrey')]}, {('Dorothy', 'son', 'Jeffrey'): [('Dorothy', 'daughter', 'Rebecca'), ('Rebecca', 'brother', 'Jeffrey')]}, {('Rebecca', 'brother', 'Jeffrey'): [('Rebecca', 'brother', 'Roberto'), ('Roberto', 'brother', 'Jeffrey')]}]
['sister', 'daughter', 'brother', 'brother']