[Cindy] asked her mother [Frances] if she could help her with college homework. [Frances] was busy so she asked [Cindy] to ask her sister [Lena] instead. [Charles] made his moth [Lena] a mother's day gift at school.
('Charles', 'Frances')
[Charles] made his moth [Lena] a mother's day gift at school. [Cindy] asked her mother [Frances] if she could help her with college homework. [Frances] was busy so she asked [Cindy] to ask her sister [Lena] instead.
[{('Charles', 'grandmother', 'Frances'): [('Charles', 'mother', 'Lena'), ('Lena', 'mother', 'Frances')]}, {('Lena', 'mother', 'Frances'): [('Lena', 'sister', 'Cindy'), ('Cindy', 'mother', 'Frances')]}]
['mother', 'sister', 'mother']