story: [David] and his sister [Donna] are going for a walk. [Gabrielle] took her grandson [Donna] to the zoo. He loved feeding the monkeys.
query: ('David', 'Gabrielle')
clean_story: [David] and his sister [Donna] are going for a walk. [Gabrielle] took her grandson [Donna] to the zoo. He loved feeding the monkeys.
proof_state: [{('David', 'grandmother', 'Gabrielle'): [('David', 'sister', 'Donna'), ('Donna', 'grandmother', 'Gabrielle')]}]