Which boxer has won a championship in the most weight classes?
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The source of the information on the unknown entity is the championship.
An entity described by source is known as a championship .
Which boxer has won a championship in the most weight classes?</s>The [unused1]None                [unused2] source
Which boxer has won a championship in the most weight classes?</s>The source of the information on the unknown entity is the championship.
Which boxer has won a championship in the most weight classes?</s>An [unused1]None                [unused2] entity
Which boxer has won a championship in the most weight classes?</s>An entity described by source is known as a championship .
Which boxer has won a championship in the most weight classes?</s>championship,0,championship,championship,described by source,[unused1]None[unused2],[unused1]None[unused2],0,championship,[unused1]None[unused2],0,[unused1]None[unused2]
Which boxer has won a championship in the most weight classes?</s>championship,0,championship,championship,described by source,None,None,0,championship,None,0,None