story: [Mary] and her sister [Rosemary] are the only children in their family. [Rosemary] took her mother [Crystal] to lunch. Then [Rosemary] picked up her husband [David] at the airport.
query: ('David', 'Crystal')
clean_story: [Rosemary] took her mother [Crystal] to lunch. Then [Rosemary] picked up her husband [David] at the airport.
proof_state: [{('David', 'mother-in-law', 'Crystal'): [('David', 'wife', 'Rosemary'), ('Rosemary', 'mother', 'Crystal')]}]