[Alfred] and his brother [Peter] went to the park to play basketball. [Sandra] took her grandson, [Erik], to see his dad, [Peter]. [Erik] and [Michelle] asked their mother, if they could go play in the pool.
[Alfred] and his brother [Peter] went to the park to play basketball. [Sandra] took her grandson, [Erik], to see his dad, [Peter].
[{('Alfred', 'mother', 'Sandra'): [('Alfred', 'brother', 'Peter'), ('Peter', 'mother', 'Sandra')]}, {('Peter', 'mother', 'Sandra'): [('Peter', 'son', 'Erik'), ('Erik', 'grandmother', 'Sandra')]}]