[Beverly] and her sister, [Tracy], went to McDonald's. [Karen], [Beverly]'s daughter, came too, and asked if she could get a sundae. [Dorothy] picked up her brother [Robert] from the airport. Then they went to her sister [Tracy]'s house for lunch.
('Robert', 'Karen')
[Dorothy] picked up her brother [Robert] from the airport. Then they went to her sister [Tracy]'s house for lunch. [Beverly] and her sister, [Tracy], went to McDonald's. [Karen], [Beverly]'s daughter, came too, and asked if she could get a sundae.
[{('Robert', 'niece', 'Karen'): [('Robert', 'sister', 'Beverly'), ('Beverly', 'daughter', 'Karen')]}, {('Robert', 'sister', 'Beverly'): [('Robert', 'sister', 'Tracy'), ('Tracy', 'sister', 'Beverly')]}, {('Robert', 'sister', 'Tracy'): [('Robert', 'sister', 'Dorothy'), ('Dorothy', 'sister', 'Tracy')]}]
['sister', 'sister', 'sister', 'daughter']