story: [Maria] was playing in the sandbox with her brother [Robert]. [Fletcher] was going to meet his wife, [Maria], for lunch. [Maria] went out for pizza with her father [Paul].
query: ('Fletcher', 'Paul')
clean_story: [Fletcher] was going to meet his wife, [Maria], for lunch. [Maria] went out for pizza with her father [Paul].
proof_state: [{('Fletcher', 'father-in-law', 'Paul'): [('Fletcher', 'wife', 'Maria'), ('Maria', 'father', 'Paul')]}]