[George] and his wife [Lillian] were excited to go to dinner with his mother [Ashley].
('Lillian', 'Ashley')
[George] and his wife [Lillian] were excited to go to dinner with his mother [Ashley].
[{('Lillian', 'mother-in-law', 'Ashley'): [('Lillian', 'husband', 'George'), ('George', 'mother', 'Ashley')]}]
['husband', 'mother']