story: [Diana] and her brother [Casey] went to the basketball game and had a great time. [James] decided to give his son [Casey], for his birthday, the latest version of Apple watch. [James] asked his brother [Peter] to help him fix his car and he said he would after he got off work. [Sandra] enjoys making burritos for her son. His name is [Peter].
query: ('Casey', 'Sandra')
clean_story: [James] decided to give his son [Casey], for his birthday, the latest version of Apple watch. [James] asked his brother [Peter] to help him fix his car and he said he would after he got off work. [Sandra] enjoys making burritos for her son. His name is [Peter].
proof_state: [{('Casey', 'grandmother', 'Sandra'): [('Casey', 'father', 'James'), ('James', 'mother', 'Sandra')]}, {('James', 'mother', 'Sandra'): [('James', 'brother', 'Peter'), ('Peter', 'mother', 'Sandra')]}]