[Kevin] bought a book for his father [Antonio]. [Erika] and her mother [Tracy] had a coffee date, and [Erika]'s sister [Emma] showed up in the middle of it. [Kevin] asked his mother, [Tracy], to bake him a cake. She told him to wait for his birthday.
('Antonio', 'Emma')
[Kevin] bought a book for his father [Antonio]. [Kevin] asked his mother, [Tracy], to bake him a cake. She told him to wait for his birthday. [Erika] and her mother [Tracy] had a coffee date, and [Erika]'s sister [Emma] showed up in the middle of it.
[{('Antonio', 'daughter', 'Emma'): [('Antonio', 'son', 'Kevin'), ('Kevin', 'sister', 'Emma')]}, {('Kevin', 'sister', 'Emma'): [('Kevin', 'sister', 'Erika'), ('Erika', 'sister', 'Emma')]}, {('Kevin', 'sister', 'Erika'): [('Kevin', 'mother', 'Tracy'), ('Tracy', 'daughter', 'Erika')]}]
['son', 'mother', 'daughter', 'sister']