[David] was mad at her brother [Francisco], because [Francisco] had called her fat. [Pete] asked his father, [Francisco] to help him build a birdhouse. [David] and her sister [Lena] played golf together. [David] won easily.
('Lena', 'Pete')
[David] and her sister [Lena] played golf together. [David] won easily. [David] was mad at her brother [Francisco], because [Francisco] had called her fat. [Pete] asked his father, [Francisco] to help him build a birdhouse.
[{('Lena', 'nephew', 'Pete'): [('Lena', 'brother', 'Francisco'), ('Francisco', 'son', 'Pete')]}, {('Lena', 'brother', 'Francisco'): [('Lena', 'sister', 'David'), ('David', 'brother', 'Francisco')]}]
['sister', 'brother', 'son']