story: [Nancy] took her son [Robert] to the park for the afternoon. [Robert] hated [Paul], so [Robert] ran away from home. [Robert] figured [Paul] did n't like being hid dad anyhow. [Robert] has a sister that picks on him. Her name is [Sabrina].
query: ('Nancy', 'Sabrina')
clean_story: [Nancy] took her son [Robert] to the park for the afternoon. [Robert] has a sister that picks on him. Her name is [Sabrina].
proof_state: [{('Nancy', 'daughter', 'Sabrina'): [('Nancy', 'son', 'Robert'), ('Robert', 'sister', 'Sabrina')]}]