[Clarence] asked his son, [George], to go grocery shopping for him. [George] was busy and sent his wife, [Lillian], instead.
('Clarence', 'Lillian')
[Clarence] asked his son, [George], to go grocery shopping for him. [George] was busy and sent his wife, [Lillian], instead.
[{('Clarence', 'daughter-in-law', 'Lillian'): [('Clarence', 'son', 'George'), ('George', 'wife', 'Lillian')]}]
['son', 'wife']