[Martha]'s sister [Tina] painted a picture for [Martha]'s mother, [Lena]. [Lena] enjoys making burritos for her son. His name is [Chris].
('Chris', 'Tina')
[Lena] enjoys making burritos for her son. His name is [Chris]. [Martha]'s sister [Tina] painted a picture for [Martha]'s mother, [Lena].
[{('Chris', 'sister', 'Tina'): [('Chris', 'mother', 'Lena'), ('Lena', 'daughter', 'Tina')]}, {('Lena', 'daughter', 'Tina'): [('Lena', 'daughter', 'Martha'), ('Martha', 'sister', 'Tina')]}]
['mother', 'daughter', 'sister']