[James] asked his mother [Dorothy] where babies came from. [Dorothy] told him they came from the stork. [Pedro] and [Dorothy] married and had two kids, [Jeffrey] and [Cheryl].
('James', 'Cheryl')
[James] asked his mother [Dorothy] where babies came from. [Dorothy] told him they came from the stork. [Pedro] and [Dorothy] married and had two kids, [Jeffrey] and [Cheryl].
[{('James', 'sister', 'Cheryl'): [('James', 'mother', 'Dorothy'), ('Dorothy', 'daughter', 'Cheryl')]}, {('Dorothy', 'daughter', 'Cheryl'): [('Dorothy', 'son', 'Jeffrey'), ('Jeffrey', 'sister', 'Cheryl')]}, {('Jeffrey', 'sister', 'Cheryl'): [('Jeffrey', 'father', 'Pedro'), ('Pedro', 'daughter', 'Cheryl')]}]
['mother', 'son', 'father', 'daughter']