[Beverly]'s son [Michael] and brother [Pedro] came to her birthday party last weekend. [Pedro] and his sister [Tracy] went to brunch today at the new diner. [Michael] and his sister [Jennifer] took their father out to eat for his birthday. They had a great time.
('Tracy', 'Jennifer')
[Pedro] and his sister [Tracy] went to brunch today at the new diner. [Beverly]'s son [Michael] and brother [Pedro] came to her birthday party last weekend. [Michael] and his sister [Jennifer] took their father out to eat for his birthday. They had a great time.
[{('Tracy', 'niece', 'Jennifer'): [('Tracy', 'sister', 'Beverly'), ('Beverly', 'daughter', 'Jennifer')]}, {('Tracy', 'sister', 'Beverly'): [('Tracy', 'brother', 'Pedro'), ('Pedro', 'sister', 'Beverly')]}, {('Beverly', 'daughter', 'Jennifer'): [('Beverly', 'son', 'Michael'), ('Michael', 'sister', 'Jennifer')]}]
['brother', 'sister', 'son', 'sister']