[Joshua] decided to paint the house while his wife [Lynn] visited her sister [Lena] and mother [Frances] in the city.
('Joshua', 'Frances')
[Joshua] decided to paint the house while his wife [Lynn] visited her sister [Lena] and mother [Frances] in the city.
[{('Joshua', 'mother-in-law', 'Frances'): [('Joshua', 'wife', 'Lynn'), ('Lynn', 'mother', 'Frances')]}, {('Lynn', 'mother', 'Frances'): [('Lynn', 'sister', 'Lena'), ('Lena', 'mother', 'Frances')]}]
['wife', 'sister', 'mother']