story: [Myrna] brought her daughter [Anna] with her to watch her son [William]'s soccer game
query: ('William', 'Anna')
clean_story: [Myrna] brought her daughter [Anna] with her to watch her son [William]'s soccer game
proof_state: [{('William', 'sister', 'Anna'): [('William', 'mother', 'Myrna'), ('Myrna', 'daughter', 'Anna')]}]