[Johnson] took his sister [Marie] out to dinner for her birthday. [James] took his grandson [Michael] to the baseball game. [Michael]'s brother [Johnson] hates baseball.
('Marie', 'James')
[Johnson] took his sister [Marie] out to dinner for her birthday. [James] took his grandson [Michael] to the baseball game. [Michael]'s brother [Johnson] hates baseball.
[{('Marie', 'grandfather', 'James'): [('Marie', 'brother', 'Johnson'), ('Johnson', 'grandfather', 'James')]}, {('Johnson', 'grandfather', 'James'): [('Johnson', 'brother', 'Michael'), ('Michael', 'grandfather', 'James')]}]
['brother', 'brother', 'grandfather']