[Clarence] was delighted to watch his son [George] steal third base in the Championship baseball game. [Clarence] took his daughter [Amy] to the movies
('Amy', 'George')
[Clarence] took his daughter [Amy] to the movies [Clarence] was delighted to watch his son [George] steal third base in the Championship baseball game.
[{('Amy', 'brother', 'George'): [('Amy', 'father', 'Clarence'), ('Clarence', 'son', 'George')]}]
['father', 'son']