[James] went golfing with his grandfather [Harold] and his mother [Dorothy]. [Marie] called [Tracy], her sister, to see if she wanted to go out to eat. [Dorothy] took her younger sister [Marie] to the carnival last weekend.
('Tracy', 'Harold')
[Marie] called [Tracy], her sister, to see if she wanted to go out to eat. [Dorothy] took her younger sister [Marie] to the carnival last weekend. [James] went golfing with his grandfather [Harold] and his mother [Dorothy].
[{('Tracy', 'father', 'Harold'): [('Tracy', 'sister', 'Marie'), ('Marie', 'father', 'Harold')]}, {('Marie', 'father', 'Harold'): [('Marie', 'sister', 'Dorothy'), ('Dorothy', 'father', 'Harold')]}, {('Dorothy', 'father', 'Harold'): [('Dorothy', 'son', 'James'), ('James', 'grandfather', 'Harold')]}]
['sister', 'sister', 'son', 'grandfather']