story: [Preston] started to make [Dana] a sandwich for lunch, [Dana] and his mother [Minnie] are very close. They spend as much time together as they can. [Otto]'s son [Dana] entered rehab for the ninth time at the age of thirty.
query: ('Otto', 'Preston')
clean_story: [Otto]'s son [Dana] entered rehab for the ninth time at the age of thirty. [Preston] started to make [Dana] a sandwich for lunch,
proof_state: [{('Otto', 'brother', 'Preston'): [('Otto', 'son', 'Dana'), ('Dana', 'uncle', 'Preston')]}]