[George] told his daughter, [April], to clean her room. [April] complained to her sister, [Janet], about having to clean her room.
('George', 'Janet')
[George] told his daughter, [April], to clean her room. [April] complained to her sister, [Janet], about having to clean her room.
[{('George', 'daughter', 'Janet'): [('George', 'daughter', 'April'), ('April', 'sister', 'Janet')]}]
['daughter', 'sister']