[Allan] and his grandfather, [Harold], went to the zoo, and had a great time together. [Michelle] went to see a comedy with her sister, [Angelica]. Meanwhile, [Angelica]'s sister [Elsie] went to see an action movie with her brother, [Allan].
('Michelle', 'Harold')
[Michelle] went to see a comedy with her sister, [Angelica]. Meanwhile, [Angelica]'s sister [Elsie] went to see an action movie with her brother, [Allan]. [Allan] and his grandfather, [Harold], went to the zoo, and had a great time together.
[{('Michelle', 'grandfather', 'Harold'): [('Michelle', 'brother', 'Allan'), ('Allan', 'grandfather', 'Harold')]}, {('Michelle', 'brother', 'Allan'): [('Michelle', 'sister', 'Elsie'), ('Elsie', 'brother', 'Allan')]}, {('Michelle', 'sister', 'Elsie'): [('Michelle', 'sister', 'Angelica'), ('Angelica', 'sister', 'Elsie')]}]
['sister', 'sister', 'brother', 'grandfather']