[Cindy] and her daughter [Anna] were on vaction. [Cindy] was so excited to learn that her son [Pete] got accepted into college. [Leonard] made dinner reservations for his sister [Anna].
('Leonard', 'Pete')
[Leonard] made dinner reservations for his sister [Anna]. [Cindy] and her daughter [Anna] were on vaction. [Cindy] was so excited to learn that her son [Pete] got accepted into college.
[{('Leonard', 'brother', 'Pete'): [('Leonard', 'sister', 'Anna'), ('Anna', 'brother', 'Pete')]}, {('Anna', 'brother', 'Pete'): [('Anna', 'mother', 'Cindy'), ('Cindy', 'son', 'Pete')]}]
['sister', 'mother', 'son']