story: [James] took his son [Bernard] for boxing lessons. He felt the boy needed to toughen up. [Bernard] loves his mother very much. Her name is [Crystal]. [Bernard] and his brother [Mark] went out for lunch. [Bernard] had a burger, and [Mark] had a chicken sandwich.
query: ('James', 'Mark')
clean_story: [James] took his son [Bernard] for boxing lessons. He felt the boy needed to toughen up. [Bernard] and his brother [Mark] went out for lunch. [Bernard] had a burger, and [Mark] had a chicken sandwich.
proof_state: [{('James', 'son', 'Mark'): [('James', 'son', 'Bernard'), ('Bernard', 'brother', 'Mark')]}]