[Hugh] went to the baseball game with his son [Michael] and his brother [Francisco]. [Francisco]'s sister, [Lena] was sick and could not join them.
('Michael', 'Lena')
[Hugh] went to the baseball game with his son [Michael] and his brother [Francisco]. [Francisco]'s sister, [Lena] was sick and could not join them.
[{('Michael', 'aunt', 'Lena'): [('Michael', 'father', 'Hugh'), ('Hugh', 'sister', 'Lena')]}, {('Hugh', 'sister', 'Lena'): [('Hugh', 'brother', 'Francisco'), ('Francisco', 'sister', 'Lena')]}]
['father', 'brother', 'sister']