[Nancy] bought a new video game for her son [Kevin]. [Kevin] fell in love with [Linda] at first sight and soon after they wed.
('Linda', 'Nancy')
[Kevin] fell in love with [Linda] at first sight and soon after they wed. [Nancy] bought a new video game for her son [Kevin].
[{('Linda', 'mother-in-law', 'Nancy'): [('Linda', 'husband', 'Kevin'), ('Kevin', 'mother', 'Nancy')]}]
['husband', 'mother']