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From Jcastle.info
The subject validation returned with a "[2,"smw-datavalue-wikipage-invalid-title","Added Hirai Castle and Hirai Kanayama Castle %28Gunma%29"]The page type input value "Added Hirai Castle and Hirai Kanayama Castle %28Gunma%29" contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process." error.
