[Ann] and her husband [Timothy] celebrated their anniversary last night. They went out to a nice restaurant to celebrate. [Timothy]'s mother [Lillian] was present at the thanksgiving service.
('Ann', 'Lillian')
[Ann] and her husband [Timothy] celebrated their anniversary last night. They went out to a nice restaurant to celebrate. [Timothy]'s mother [Lillian] was present at the thanksgiving service.
[{('Ann', 'mother-in-law', 'Lillian'): [('Ann', 'husband', 'Timothy'), ('Timothy', 'mother', 'Lillian')]}]
['husband', 'mother']