[Pedro] took his daughter [Cheryl] and son [James] to see a ball game. [James] waited for [Heather] to wrap up at work. [Cheryl] loved her mother [Dorothy]. She was heartbroken when she heard [Dorothy] had suddenly passed away.
('Heather', 'Dorothy')
[James] waited for [Heather] to wrap up at work. [Pedro] took his daughter [Cheryl] and son [James] to see a ball game. [Cheryl] loved her mother [Dorothy]. She was heartbroken when she heard [Dorothy] had suddenly passed away.
[{('Heather', 'mother-in-law', 'Dorothy'): [('Heather', 'husband', 'James'), ('James', 'mother', 'Dorothy')]}, {('James', 'mother', 'Dorothy'): [('James', 'sister', 'Cheryl'), ('Cheryl', 'mother', 'Dorothy')]}, {('James', 'sister', 'Cheryl'): [('James', 'father', 'Pedro'), ('Pedro', 'daughter', 'Cheryl')]}]
['husband', 'father', 'daughter', 'mother']