story: [Sidney] has a sister who has a son. The son is named [Alan]. [Elliott] is an engineer who loves to take his son [Sidney] to the science museum to help him learn about the world [Alan] took his son [Clarence] to soccer practice.
query: ('Elliott', 'Clarence')
clean_story: [Elliott] is an engineer who loves to take his son [Sidney] to the science museum to help him learn about the world [Sidney] has a sister who has a son. The son is named [Alan]. [Alan] took his son [Clarence] to soccer practice.
proof_state: [{('Elliott', 'nephew', 'Clarence'): [('Elliott', 'brother', 'Alan'), ('Alan', 'son', 'Clarence')]}, {('Elliott', 'brother', 'Alan'): [('Elliott', 'son', 'Sidney'), ('Sidney', 'uncle', 'Alan')]}]