[Leonard] took a vacation from his job to visit his mother [Cindy] across the country for Mother's Day. [Anna] was mad at her brother [Leonard], because [Leonard] had called her fat. [Cindy] visited her son [Pete] at college.
('Anna', 'Pete')
[Anna] was mad at her brother [Leonard], because [Leonard] had called her fat. [Leonard] took a vacation from his job to visit his mother [Cindy] across the country for Mother's Day. [Cindy] visited her son [Pete] at college.
[{('Anna', 'brother', 'Pete'): [('Anna', 'mother', 'Cindy'), ('Cindy', 'son', 'Pete')]}, {('Anna', 'mother', 'Cindy'): [('Anna', 'brother', 'Leonard'), ('Leonard', 'mother', 'Cindy')]}]
['brother', 'mother', 'son']