story: [Sabrina] was playing in the sandbox with her brother [Robert]. [Leo] asked his wife, [Sabrina], to save money for a vacation. [Sabrina]'s father, [Paul], chipped in some money.
query: ('Leo', 'Paul')
clean_story: [Leo] asked his wife, [Sabrina], to save money for a vacation. [Sabrina]'s father, [Paul], chipped in some money.
proof_state: [{('Leo', 'father-in-law', 'Paul'): [('Leo', 'wife', 'Sabrina'), ('Sabrina', 'father', 'Paul')]}]