[Ann] and her husband [Timothy] are going to visit [Ann]'s mother, [Lillian].
('Timothy', 'Lillian')
[Ann] and her husband [Timothy] are going to visit [Ann]'s mother, [Lillian].
[{('Timothy', 'mother-in-law', 'Lillian'): [('Timothy', 'wife', 'Ann'), ('Ann', 'mother', 'Lillian')]}]
['wife', 'mother']