story: [Scott] and his brother [Casey] played at jacks. [Diana] and her brother [Scott] took her grandmother [Sandra] to the store to buy a new dress. [Rose] took her daughter [Diana] to school during the cold winter morning.
query: ('Sandra', 'Casey')
clean_story: [Diana] and her brother [Scott] took her grandmother [Sandra] to the store to buy a new dress. [Scott] and his brother [Casey] played at jacks.
proof_state: [{('Sandra', 'grandson', 'Casey'): [('Sandra', 'grandson', 'Scott'), ('Scott', 'brother', 'Casey')]}, {('Sandra', 'grandson', 'Scott'): [('Sandra', 'granddaughter', 'Diana'), ('Diana', 'brother', 'Scott')]}]