[Joshua] took his sister [Lena] to the movies with him to see the new Star Wars film. [David] and her son [Bobby] went to the zoo and then out to dinner yesterday. [Bobby] liked to visit his uncle [Joshua]. They played ball together a lot.
('David', 'Lena')
[David] and her son [Bobby] went to the zoo and then out to dinner yesterday. [Bobby] liked to visit his uncle [Joshua]. They played ball together a lot. [Joshua] took his sister [Lena] to the movies with him to see the new Star Wars film.
[{('David', 'sister', 'Lena'): [('David', 'brother', 'Joshua'), ('Joshua', 'sister', 'Lena')]}, {('David', 'brother', 'Joshua'): [('David', 'son', 'Bobby'), ('Bobby', 'uncle', 'Joshua')]}]
['son', 'uncle', 'sister']