[Rebecca] saw her mother, [Dorothy], at the mall. [Dorothy] was there shopping with her son [Jeffrey]. [Jeffrey] always enjoyed playing with his sister, [Cheryl], when they were growing up. [Cheryl]'s uncle [Robert] was looking forward to visiting for the summer.
('Rebecca', 'Robert')
[Rebecca] saw her mother, [Dorothy], at the mall. [Dorothy] was there shopping with her son [Jeffrey]. [Jeffrey] always enjoyed playing with his sister, [Cheryl], when they were growing up. [Cheryl]'s uncle [Robert] was looking forward to visiting for the summer.
[{('Rebecca', 'uncle', 'Robert'): [('Rebecca', 'mother', 'Dorothy'), ('Dorothy', 'brother', 'Robert')]}, {('Dorothy', 'brother', 'Robert'): [('Dorothy', 'daughter', 'Cheryl'), ('Cheryl', 'uncle', 'Robert')]}, {('Dorothy', 'daughter', 'Cheryl'): [('Dorothy', 'son', 'Jeffrey'), ('Jeffrey', 'sister', 'Cheryl')]}]
['mother', 'son', 'sister', 'uncle']