[Harold] bought his granddaughter [Rebecca] a skirt. [Harold] went to pick up his daughter [Tracy] from school on the last day before summer vacation. [Dorothy] told her son [Jeffrey] to go outside and play. His sister [Rebecca] went with him.
('Dorothy', 'Tracy')
[Dorothy] told her son [Jeffrey] to go outside and play. His sister [Rebecca] went with him. [Harold] bought his granddaughter [Rebecca] a skirt. [Harold] went to pick up his daughter [Tracy] from school on the last day before summer vacation.
[{('Dorothy', 'sister', 'Tracy'): [('Dorothy', 'father', 'Harold'), ('Harold', 'daughter', 'Tracy')]}, {('Dorothy', 'father', 'Harold'): [('Dorothy', 'daughter', 'Rebecca'), ('Rebecca', 'grandfather', 'Harold')]}, {('Dorothy', 'daughter', 'Rebecca'): [('Dorothy', 'son', 'Jeffrey'), ('Jeffrey', 'sister', 'Rebecca')]}]
['son', 'sister', 'grandfather', 'daughter']