[Pedro] and his wife [Dorothy] made a pizza for their son [Jeffrey]. [Jeffrey]'s sister [Cheryl] ate pasta instead. [Tracy]'s niece [Cheryl] was a massive fan of Pokemon.
('Pedro', 'Tracy')
[Pedro] and his wife [Dorothy] made a pizza for their son [Jeffrey]. [Jeffrey]'s sister [Cheryl] ate pasta instead. [Tracy]'s niece [Cheryl] was a massive fan of Pokemon.
[{('Pedro', 'sister', 'Tracy'): [('Pedro', 'daughter', 'Cheryl'), ('Cheryl', 'aunt', 'Tracy')]}, {('Pedro', 'daughter', 'Cheryl'): [('Pedro', 'wife', 'Dorothy'), ('Dorothy', 'daughter', 'Cheryl')]}, {('Dorothy', 'daughter', 'Cheryl'): [('Dorothy', 'son', 'Jeffrey'), ('Jeffrey', 'sister', 'Cheryl')]}]
['wife', 'son', 'sister', 'aunt']