story: [Myrna] told her son [William] to go outside and play. His sister [Lucille] went with him.
query: ('Myrna', 'Lucille')
clean_story: [Myrna] told her son [William] to go outside and play. His sister [Lucille] went with him.
proof_state: [{('Myrna', 'daughter', 'Lucille'): [('Myrna', 'son', 'William'), ('William', 'sister', 'Lucille')]}]