[David] is teaching her niece, [Martha] how to bake a homemade apple pie. [Lena] and her sister, [Cindy], went to McDonald's. [Martha], [Lena]'s daughter, came too, and asked if she could get a sundae.
('Cindy', 'David')
[Lena] and her sister, [Cindy], went to McDonald's. [Martha], [Lena]'s daughter, came too, and asked if she could get a sundae. [David] is teaching her niece, [Martha] how to bake a homemade apple pie.
[{('Cindy', 'sister', 'David'): [('Cindy', 'sister', 'Lena'), ('Lena', 'sister', 'David')]}, {('Lena', 'sister', 'David'): [('Lena', 'daughter', 'Martha'), ('Martha', 'aunt', 'David')]}]
['sister', 'daughter', 'aunt']