[Leonard] took his brother [Wayne] out to get drinks after a long work week. [Wilhelmina] gave her brother [Leonard] a new sweater for Christmas. [Wayne] asked his grandmother [Frances] for a cookie. [Frances] smiled and said yes.
('Wilhelmina', 'Frances')
[Wilhelmina] gave her brother [Leonard] a new sweater for Christmas. [Leonard] took his brother [Wayne] out to get drinks after a long work week. [Wayne] asked his grandmother [Frances] for a cookie. [Frances] smiled and said yes.
[{('Wilhelmina', 'grandmother', 'Frances'): [('Wilhelmina', 'brother', 'Leonard'), ('Leonard', 'grandmother', 'Frances')]}, {('Leonard', 'grandmother', 'Frances'): [('Leonard', 'brother', 'Wayne'), ('Wayne', 'grandmother', 'Frances')]}]
['brother', 'brother', 'grandmother']