[Michelle] could n't wait for the surprise birthday party that she was throwing for her brother [Allan] next weekend. [John] and his sister [Elsie] went to the movies to watch the newest superhero flick. [Robert] took his son [Allan] to batting practice with his baseball team, but had to leave him there alone for an hour to pick up his daughter [Elsie].
('John', 'Michelle')
[John] and his sister [Elsie] went to the movies to watch the newest superhero flick. [Robert] took his son [Allan] to batting practice with his baseball team, but had to leave him there alone for an hour to pick up his daughter [Elsie]. [Michelle] could n't wait for the surprise birthday party that she was throwing for her brother [Allan] next weekend.
[{('John', 'sister', 'Michelle'): [('John', 'sister', 'Elsie'), ('Elsie', 'sister', 'Michelle')]}, {('Elsie', 'sister', 'Michelle'): [('Elsie', 'father', 'Robert'), ('Robert', 'daughter', 'Michelle')]}, {('Robert', 'daughter', 'Michelle'): [('Robert', 'son', 'Allan'), ('Allan', 'sister', 'Michelle')]}]
['sister', 'father', 'son', 'sister']