[Brent] and his grandfather [Roy] played a game of chess together. [Brent]'s sister [Laura] watched and waited to play against the winner.
('Laura', 'Roy')
[Brent] and his grandfather [Roy] played a game of chess together. [Brent]'s sister [Laura] watched and waited to play against the winner.
[{('Laura', 'grandfather', 'Roy'): [('Laura', 'brother', 'Brent'), ('Brent', 'grandfather', 'Roy')]}]