story: [Fletcher] invited his uncle [Otto] to dinner [Nancy] talks to her son [Fletcher] every day. [Claire] and her mother [Nancy] went to volunteer at the homeless shelter last weekend.
query: ('Nancy', 'Otto')
clean_story: [Nancy] talks to her son [Fletcher] every day. [Fletcher] invited his uncle [Otto] to dinner
proof_state: [{('Nancy', 'brother', 'Otto'): [('Nancy', 'son', 'Fletcher'), ('Fletcher', 'uncle', 'Otto')]}]