story: [Rose] baked a cake for her son [Errol]. [Carol] and her sister [Rose] went out to lunch with [Carol]'s sister [Lisa]. [Rose] wants to make a special meal for her daughter [Jennifer]'s birthday.
query: ('Lisa', 'Errol')
clean_story: [Carol] and her sister [Rose] went out to lunch with [Carol]'s sister [Lisa]. [Rose] baked a cake for her son [Errol].
proof_state: [{('Lisa', 'nephew', 'Errol'): [('Lisa', 'sister', 'Rose'), ('Rose', 'son', 'Errol')]}, {('Lisa', 'sister', 'Rose'): [('Lisa', 'sister', 'Carol'), ('Carol', 'sister', 'Rose')]}]