[Douglas] picked up his daughter, and her son [Clarence], from the airport last Wednesday. [Douglas] borrowed some money from his sister [Janet].
('Clarence', 'Janet')
[Douglas] picked up his daughter, and her son [Clarence], from the airport last Wednesday. [Douglas] borrowed some money from his sister [Janet].
[{('Clarence', 'granddaughter', 'Janet'): [('Clarence', 'grandson', 'Douglas'), ('Douglas', 'sister', 'Janet')]}]
['grandson', 'sister']