The subject validation returned with a "[2,"smw-datavalue-wikipage-invalid-title","Origins%3AHome%2FSlideshow%23Working_Group_%26_Short_Course%3A_Population_and_the_Environment"]The page type input value "Origins%3AHome%2FSlideshow%23Working_Group_%26_Short_Course%3A_Population_and_the_Environment" contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process." error.