[Jeffrey] often goes out for lunch with his sister, [Heather]. [Dorothy] asked her son [Jeffrey] to help her fix her television. [Heather] spent the whole month of January at her grandfather [Harold]'s house. [Harold] took his daughter [Tracy] to the zoo for her birthday. Then they went to go get some ice cream.
('Dorothy', 'Tracy')
[Dorothy] asked her son [Jeffrey] to help her fix her television. [Jeffrey] often goes out for lunch with his sister, [Heather]. [Heather] spent the whole month of January at her grandfather [Harold]'s house. [Harold] took his daughter [Tracy] to the zoo for her birthday. Then they went to go get some ice cream.
[{('Dorothy', 'sister', 'Tracy'): [('Dorothy', 'father', 'Harold'), ('Harold', 'daughter', 'Tracy')]}, {('Dorothy', 'father', 'Harold'): [('Dorothy', 'son', 'Jeffrey'), ('Jeffrey', 'grandfather', 'Harold')]}, {('Jeffrey', 'grandfather', 'Harold'): [('Jeffrey', 'sister', 'Heather'), ('Heather', 'grandfather', 'Harold')]}]
['son', 'sister', 'grandfather', 'daughter']