story: [Preston] is happy that his brother, [Otto], is becoming successful. [Otto] is an engineer who loves to take his son [Dana] to the science museum to help him learn about the world [Otto] took his wife [Minnie] out on a date last weekend.
query: ('Preston', 'Dana')
clean_story: [Preston] is happy that his brother, [Otto], is becoming successful. [Otto] is an engineer who loves to take his son [Dana] to the science museum to help him learn about the world
proof_state: [{('Preston', 'nephew', 'Dana'): [('Preston', 'brother', 'Otto'), ('Otto', 'son', 'Dana')]}]