story: [Nancy] read her son [Jess] a bedtime story every night. [Nancy] loves her brother [Preston]. [Robert]'s mother [Nancy] was present at the thanksgiving service.
query: ('Robert', 'Preston')
clean_story: [Robert]'s mother [Nancy] was present at the thanksgiving service. [Nancy] loves her brother [Preston].
proof_state: [{('Robert', 'uncle', 'Preston'): [('Robert', 'mother', 'Nancy'), ('Nancy', 'brother', 'Preston')]}]