[Dennis]'s grandfather [Clarence] takes him to football games every Sunday during the season. [Natalia]'s brother [Dennis] was going to be the star in the new show.
('Natalia', 'Clarence')
[Natalia]'s brother [Dennis] was going to be the star in the new show. [Dennis]'s grandfather [Clarence] takes him to football games every Sunday during the season.
[{('Natalia', 'grandfather', 'Clarence'): [('Natalia', 'brother', 'Dennis'), ('Dennis', 'grandfather', 'Clarence')]}]
['brother', 'grandfather']