[Alfred] was thrilled his brother, [Peter], was able to make it to the party. [Sandra] took her grandson, [Edward], to see his dad, [James]. [James] played chess with his brother [Peter].
[James] played chess with his brother [Peter]. [Sandra] took her grandson, [Edward], to see his dad, [James].
[{('Peter', 'mother', 'Sandra'): [('Peter', 'brother', 'James'), ('James', 'mother', 'Sandra')]}, {('James', 'mother', 'Sandra'): [('James', 'son', 'Edward'), ('Edward', 'grandmother', 'Sandra')]}]