[James] asked his grandson, [Michael], what he wanted to be when he grew up. [Michael] told him he wanted to be a grandpa. [David]'s son, [Bobby], went with her to the store to buy candy for Halloween. [Michael] took a vacation from his job to visit his mother [David] across the country for Mother's Day.
('James', 'Bobby')
[James] asked his grandson, [Michael], what he wanted to be when he grew up. [Michael] told him he wanted to be a grandpa. [Michael] took a vacation from his job to visit his mother [David] across the country for Mother's Day. [David]'s son, [Bobby], went with her to the store to buy candy for Halloween.
[{('James', 'grandson', 'Bobby'): [('James', 'grandson', 'Michael'), ('Michael', 'brother', 'Bobby')]}, {('Michael', 'brother', 'Bobby'): [('Michael', 'mother', 'David'), ('David', 'son', 'Bobby')]}]
['grandson', 'mother', 'son']