story: [Casey] bought his sister [Jennifer] a video game for her birthday. She said it was her favorite game and gave him a big hug. [Casey]'s mother [Rose] wanted to surprise him for his birthday, so she baked him a cake. [Jennifer] went to visit his grandmother, [Sandra], at the nursing home. She was grateful for the company, she had n't had a family visit in months. [Casey]'s father [James] is going to coach the team this year.
query: ('James', 'Sandra')
clean_story: [Casey]'s father [James] is going to coach the team this year. [Casey] bought his sister [Jennifer] a video game for her birthday. She said it was her favorite game and gave him a big hug. [Jennifer] went to visit his grandmother, [Sandra], at the nursing home. She was grateful for the company, she had n't had a family visit in months.
proof_state: [{('James', 'mother', 'Sandra'): [('James', 'daughter', 'Jennifer'), ('Jennifer', 'grandmother', 'Sandra')]}, {('James', 'daughter', 'Jennifer'): [('James', 'son', 'Casey'), ('Casey', 'sister', 'Jennifer')]}]