story: [Preston] bought ice cream for [Jess]'s birthday. [Paul] took his son [Jess] for boxing lessons. He felt the boy needed to toughen up. [Robert]'s father's name is [Paul].
query: ('Paul', 'Preston')
clean_story: [Paul] took his son [Jess] for boxing lessons. He felt the boy needed to toughen up. [Preston] bought ice cream for [Jess]'s birthday.
proof_state: [{('Paul', 'brother', 'Preston'): [('Paul', 'son', 'Jess'), ('Jess', 'uncle', 'Preston')]}]