[Martha] is looking for a good gift for her sister [Lois]. [Ernest] took his sister [Martha] to the movies with him to see the new Star Wars film.
('Ernest', 'Lois')
[Ernest] took his sister [Martha] to the movies with him to see the new Star Wars film. [Martha] is looking for a good gift for her sister [Lois].
[{('Ernest', 'sister', 'Lois'): [('Ernest', 'sister', 'Martha'), ('Martha', 'sister', 'Lois')]}]