[Cheryl] is getting married. She is looking forward to her sister, [Heather], attending. They have n't seen each other since [Heather] relocated to California with her husband 3 years ago. [Jeffrey]'s sister, [Cheryl], bought movie tickets at a discount rate. [Cheryl] is a woman with a sister named [Heather]. [Cheryl] called her mother [Dorothy] to let her know she will be back home soon.
('Jeffrey', 'Dorothy')
[Jeffrey]'s sister, [Cheryl], bought movie tickets at a discount rate. [Cheryl] is getting married. She is looking forward to her sister, [Heather], attending. They have n't seen each other since [Heather] relocated to California with her husband 3 years ago. [Cheryl] is a woman with a sister named [Heather]. [Cheryl] called her mother [Dorothy] to let her know she will be back home soon.
[{('Jeffrey', 'mother', 'Dorothy'): [('Jeffrey', 'sister', 'Heather'), ('Heather', 'mother', 'Dorothy')]}, {('Jeffrey', 'sister', 'Heather'): [('Jeffrey', 'sister', 'Cheryl'), ('Cheryl', 'sister', 'Heather')]}, {('Heather', 'mother', 'Dorothy'): [('Heather', 'sister', 'Cheryl'), ('Cheryl', 'mother', 'Dorothy')]}]
['sister', 'sister', 'sister', 'mother']