story: [Rudolph] bought his daughter, [Lisbeth], flowers. [Lisbeth] asked her sister [Carol] if she could come over for dinner. [Carol] told her she could n't, because she had to care for her sick son, [Richard]. [Carol] liked to play hide and seek with her son [David].
query: ('Rudolph', 'Richard')
clean_story: [Rudolph] bought his daughter, [Lisbeth], flowers. [Lisbeth] asked her sister [Carol] if she could come over for dinner. [Carol] told her she could n't, because she had to care for her sick son, [Richard].
proof_state: [{('Rudolph', 'grandson', 'Richard'): [('Rudolph', 'daughter', 'Carol'), ('Carol', 'son', 'Richard')]}, {('Rudolph', 'daughter', 'Carol'): [('Rudolph', 'daughter', 'Lisbeth'), ('Lisbeth', 'sister', 'Carol')]}]