[Joshua] took his son [Don] to the park on Saturday and while there they saw [Joshua]'s brother [Francisco]. [Francisco] took his sister [David] to the movies with him to see the new Star Wars film.
('Don', 'David')
[Joshua] took his son [Don] to the park on Saturday and while there they saw [Joshua]'s brother [Francisco]. [Francisco] took his sister [David] to the movies with him to see the new Star Wars film.
[{('Don', 'aunt', 'David'): [('Don', 'father', 'Joshua'), ('Joshua', 'sister', 'David')]}, {('Joshua', 'sister', 'David'): [('Joshua', 'brother', 'Francisco'), ('Francisco', 'sister', 'David')]}]
['father', 'brother', 'sister']