[Ann] and her sister [April] are the only children in their family. [Lillian] wants to make a special meal for her daughter [April]'s birthday.
('Lillian', 'Ann')
[Lillian] wants to make a special meal for her daughter [April]'s birthday. [Ann] and her sister [April] are the only children in their family.
[{('Lillian', 'daughter', 'Ann'): [('Lillian', 'daughter', 'April'), ('April', 'sister', 'Ann')]}]
['daughter', 'sister']