story: [Christopher] read his daughter [Angela] a bedtime story. Soon she was fast asleep. [Anna] called [Angela], her sister, to see if she wanted to go out to eat.
query: ('Christopher', 'Anna')
clean_story: [Christopher] read his daughter [Angela] a bedtime story. Soon she was fast asleep. [Anna] called [Angela], her sister, to see if she wanted to go out to eat.
proof_state: [{('Christopher', 'daughter', 'Anna'): [('Christopher', 'daughter', 'Angela'), ('Angela', 'sister', 'Anna')]}]