story: [Preston] took his son [Edward] to school this morning because he missed the bus. [Michelle] took her son [Preston] to the park. [Crystal] was playing in the sandbox with her brother [Preston].
query: ('Crystal', 'Michelle')
clean_story: [Crystal] was playing in the sandbox with her brother [Preston]. [Michelle] took her son [Preston] to the park.
proof_state: [{('Crystal', 'mother', 'Michelle'): [('Crystal', 'brother', 'Preston'), ('Preston', 'mother', 'Michelle')]}]