[Rebecca] threw an anniversary party for her father, [Pedro], and her mother, [Dorothy]. [Dorothy]'s daughter, [Heather], helped with baking the cake. [Heather] has an aunt named [Tracy]
('Pedro', 'Tracy')
[Rebecca] threw an anniversary party for her father, [Pedro], and her mother, [Dorothy]. [Dorothy]'s daughter, [Heather], helped with baking the cake. [Heather] has an aunt named [Tracy]
[{('Pedro', 'sister', 'Tracy'): [('Pedro', 'daughter', 'Heather'), ('Heather', 'aunt', 'Tracy')]}, {('Pedro', 'daughter', 'Heather'): [('Pedro', 'daughter', 'Rebecca'), ('Rebecca', 'sister', 'Heather')]}, {('Rebecca', 'sister', 'Heather'): [('Rebecca', 'mother', 'Dorothy'), ('Dorothy', 'daughter', 'Heather')]}]
['daughter', 'mother', 'daughter', 'aunt']