[Mary]'s sister, [Natalia], recently started acting. [Clarence] and his grandmother [Natalia] went water skiing. [Clarence] had some trouble at first, but [Natalia] taught him how to keep his balance and he soon got pretty good at it.
('Clarence', 'Mary')
[Clarence] and his grandmother [Natalia] went water skiing. [Clarence] had some trouble at first, but [Natalia] taught him how to keep his balance and he soon got pretty good at it. [Mary]'s sister, [Natalia], recently started acting.
[{('Clarence', 'granddaughter', 'Mary'): [('Clarence', 'granddaughter', 'Natalia'), ('Natalia', 'sister', 'Mary')]}]
['granddaughter', 'sister']