[Clarence] and his grandmother [Rosetta] went water skiing. [Clarence] had some trouble at first, but [Rosetta] taught him how to keep his balance and he soon got pretty good at it. [Charlotte] and her sister [Rosetta] were getting together this weekend so that they could go hiking together they had n't spent time together alone in a while.
('Clarence', 'Charlotte')
[Clarence] and his grandmother [Rosetta] went water skiing. [Clarence] had some trouble at first, but [Rosetta] taught him how to keep his balance and he soon got pretty good at it. [Charlotte] and her sister [Rosetta] were getting together this weekend so that they could go hiking together they had n't spent time together alone in a while.
[{('Clarence', 'granddaughter', 'Charlotte'): [('Clarence', 'granddaughter', 'Rosetta'), ('Rosetta', 'sister', 'Charlotte')]}]
['granddaughter', 'sister']