[Lillian] was so glad to travel with her son, [John]. He made the trip enjoyable. [John] proposed to his wife [Andrea] over a year ago.
('Andrea', 'Lillian')
[John] proposed to his wife [Andrea] over a year ago. [Lillian] was so glad to travel with her son, [John]. He made the trip enjoyable.
[{('Andrea', 'mother-in-law', 'Lillian'): [('Andrea', 'husband', 'John'), ('John', 'mother', 'Lillian')]}]
['husband', 'mother']