story: [Minnie] went with her brother [James] to the mall to buy some new candles. [James] is a sibling of [Preston]. [Bernard] and his father [James] played video games all day last Saturday.
query: ('Bernard', 'Preston')
clean_story: [Bernard] and his father [James] played video games all day last Saturday. [James] is a sibling of [Preston].
proof_state: [{('Bernard', 'uncle', 'Preston'): [('Bernard', 'father', 'James'), ('James', 'brother', 'Preston')]}]