[Martha] and her husband, [Irvin], were visiting her brother, [Chris], in San Diego, California for the week. [Lena] made a surprise visit to her son, [Chris]'s, house the same week.
('Lena', 'Irvin')
[Martha] and her husband, [Irvin], were visiting her brother, [Chris], in San Diego, California for the week. [Lena] made a surprise visit to her son, [Chris]'s, house the same week.
[{('Lena', 'son-in-law', 'Irvin'): [('Lena', 'daughter', 'Martha'), ('Martha', 'husband', 'Irvin')]}, {('Lena', 'daughter', 'Martha'): [('Lena', 'son', 'Chris'), ('Chris', 'sister', 'Martha')]}]
['son', 'sister', 'husband']