story: Last weekend, [William] went to the beach with his father, [Christopher]. They could n't go this weekend, because [Christopher] had to go to his daughter [Lucille]'s piano recital instead.
query: ('William', 'Lucille')
clean_story: Last weekend, [William] went to the beach with his father, [Christopher]. They could n't go this weekend, because [Christopher] had to go to his daughter [Lucille]'s piano recital instead.
proof_state: [{('William', 'sister', 'Lucille'): [('William', 'father', 'Christopher'), ('Christopher', 'daughter', 'Lucille')]}]