[Glen]'s sister [Emily] asked him for some help planting her garden. [Emily] went to London to visit her grandfather, [Clarence].
('Clarence', 'Glen')
[Emily] went to London to visit her grandfather, [Clarence]. [Glen]'s sister [Emily] asked him for some help planting her garden.
[{('Clarence', 'grandson', 'Glen'): [('Clarence', 'granddaughter', 'Emily'), ('Emily', 'brother', 'Glen')]}]
['granddaughter', 'brother']