[George] is husband of [Lillian] and son of [Clarence].
('Clarence', 'Lillian')
[George] is husband of [Lillian] and son of [Clarence].
[{('Clarence', 'daughter-in-law', 'Lillian'): [('Clarence', 'son', 'George'), ('George', 'wife', 'Lillian')]}]
['son', 'wife']