story: [Sheila] baked a chocolate cake for her grandfather [Jason] on his birthday. [Sheila] and her sister [Michele] are the only children in their family.
query: ('Michele', 'Jason')
clean_story: [Sheila] and her sister [Michele] are the only children in their family. [Sheila] baked a chocolate cake for her grandfather [Jason] on his birthday.
proof_state: [{('Michele', 'grandfather', 'Jason'): [('Michele', 'sister', 'Sheila'), ('Sheila', 'grandfather', 'Jason')]}]