story: [Gabrielle]'s grandson [William] was playing in the pool with his sister [Anna].
query: ('Gabrielle', 'Anna')
clean_story: [Gabrielle]'s grandson [William] was playing in the pool with his sister [Anna].
proof_state: [{('Gabrielle', 'granddaughter', 'Anna'): [('Gabrielle', 'grandson', 'William'), ('William', 'sister', 'Anna')]}]