[Tina] thought about how fortunate she was as she watched the sunset on the beach with her husband [Charles]. [Lena]'s mom, [Martha] got ready for the party. [Charles] and his sister [Martha] got their mother [Martha] a new computer for her birthday. She really liked it.
('Tina', 'Lena')
[Tina] thought about how fortunate she was as she watched the sunset on the beach with her husband [Charles]. [Charles] and his sister [Martha] got their mother [Martha] a new computer for her birthday. She really liked it. [Lena]'s mom, [Martha] got ready for the party.
[{('Tina', 'mother-in-law', 'Lena'): [('Tina', 'husband', 'Charles'), ('Charles', 'mother', 'Lena')]}, {('Charles', 'mother', 'Lena'): [('Charles', 'sister', 'Martha'), ('Martha', 'mother', 'Lena')]}]
['husband', 'sister', 'mother']