[Clarence] was sitting in the stands as he watched his daughter [Lillian] walk across the aisle and get her college diploma. [John] was adopted kid. He discovered last week that [Lillian] is his mother.
('John', 'Clarence')
[John] was adopted kid. He discovered last week that [Lillian] is his mother. [Clarence] was sitting in the stands as he watched his daughter [Lillian] walk across the aisle and get her college diploma.
[{('John', 'grandfather', 'Clarence'): [('John', 'mother', 'Lillian'), ('Lillian', 'father', 'Clarence')]}]
['mother', 'father']