[Pedro] and his sister [Beverly] were twins. Still, they did n't look very much alike. [Marie] is a woman with a sister named [Beverly]. [Angelica] got a big birthday cake from her aunt [Tracy]. [Marie] loved to play dress-up with her daughter [Angelica].
('Pedro', 'Tracy')
[Pedro] and his sister [Beverly] were twins. Still, they did n't look very much alike. [Marie] is a woman with a sister named [Beverly]. [Marie] loved to play dress-up with her daughter [Angelica]. [Angelica] got a big birthday cake from her aunt [Tracy].
[{('Pedro', 'sister', 'Tracy'): [('Pedro', 'sister', 'Marie'), ('Marie', 'sister', 'Tracy')]}, {('Marie', 'sister', 'Tracy'): [('Marie', 'daughter', 'Angelica'), ('Angelica', 'aunt', 'Tracy')]}, {('Pedro', 'sister', 'Marie'): [('Pedro', 'sister', 'Beverly'), ('Beverly', 'sister', 'Marie')]}]
['sister', 'sister', 'daughter', 'aunt']