[Frances] took her daughter, [Lena], to lunch. [Irvin] met his brother [Theodore] for drinks after work. [Theodore] took a vacation from his job to visit his mother [Lena] across the country for Mother's Day.
('Irvin', 'Frances')
[Irvin] met his brother [Theodore] for drinks after work. [Theodore] took a vacation from his job to visit his mother [Lena] across the country for Mother's Day. [Frances] took her daughter, [Lena], to lunch.
[{('Irvin', 'grandmother', 'Frances'): [('Irvin', 'mother', 'Lena'), ('Lena', 'mother', 'Frances')]}, {('Irvin', 'mother', 'Lena'): [('Irvin', 'brother', 'Theodore'), ('Theodore', 'mother', 'Lena')]}]
['brother', 'mother', 'mother']