story: [Edward]'s mother, [Melissa], was too busy to play with him. She was helping her daughter, [Stacy], with her homework. [Edward] bought his sister [Kerri] a video game for her birthday. She said it was her favorite game and gave him a big hug.
query: ('Edward', 'Stacy')
clean_story: [Edward]'s mother, [Melissa], was too busy to play with him. She was helping her daughter, [Stacy], with her homework.
proof_state: [{('Edward', 'sister', 'Stacy'): [('Edward', 'mother', 'Melissa'), ('Melissa', 'daughter', 'Stacy')]}]