[Don] and his father [Joshua] played video games all day last Saturday. [Lena] and her brother [Francisco] played ball outside. [Lena]'s brother [Joshua] stayed inside.
('Don', 'Francisco')
[Don] and his father [Joshua] played video games all day last Saturday. [Lena] and her brother [Francisco] played ball outside. [Lena]'s brother [Joshua] stayed inside.
[{('Don', 'uncle', 'Francisco'): [('Don', 'father', 'Joshua'), ('Joshua', 'brother', 'Francisco')]}, {('Joshua', 'brother', 'Francisco'): [('Joshua', 'sister', 'Lena'), ('Lena', 'brother', 'Francisco')]}]
['father', 'sister', 'brother']