[Annie] is so proud that [Pedro], his father, quit smoking. [Pedro] and his daughter, [Heather] go to concerts every week. [Cheryl] wanted to go shopping and she asked her mother [Dorothy] to go with her. She then decided to ask her sister [Heather] to go too.
('Annie', 'Dorothy')
[Annie] is so proud that [Pedro], his father, quit smoking. [Pedro] and his daughter, [Heather] go to concerts every week. [Cheryl] wanted to go shopping and she asked her mother [Dorothy] to go with her. She then decided to ask her sister [Heather] to go too.
[{('Annie', 'mother', 'Dorothy'): [('Annie', 'sister', 'Cheryl'), ('Cheryl', 'mother', 'Dorothy')]}, {('Annie', 'sister', 'Cheryl'): [('Annie', 'father', 'Pedro'), ('Pedro', 'daughter', 'Cheryl')]}, {('Pedro', 'daughter', 'Cheryl'): [('Pedro', 'daughter', 'Heather'), ('Heather', 'sister', 'Cheryl')]}]
['father', 'daughter', 'sister', 'mother']