[Ronald] took his sisters [Michelle] and [Angelica] on a hiking trip last weekend. [Allan] bought a present for his mother [Marie]. [Allan] took his sister [Michelle] out to dinner for her birthday.
('Angelica', 'Marie')
[Ronald] took his sisters [Michelle] and [Angelica] on a hiking trip last weekend. [Allan] took his sister [Michelle] out to dinner for her birthday. [Allan] bought a present for his mother [Marie].
[{('Angelica', 'mother', 'Marie'): [('Angelica', 'brother', 'Ronald'), ('Ronald', 'mother', 'Marie')]}, {('Ronald', 'mother', 'Marie'): [('Ronald', 'sister', 'Michelle'), ('Michelle', 'mother', 'Marie')]}, {('Michelle', 'mother', 'Marie'): [('Michelle', 'brother', 'Allan'), ('Allan', 'mother', 'Marie')]}]
['brother', 'sister', 'brother', 'mother']