public static function importSingleArticle($line, $editionId, $index)
 {
     $article = self::createArticle($line, $editionId, $index);
     ArticleDao::persist($article);
 }
 public static function importSingleArticle($line, $editionId, $index, $topic)
 {
     $article = self::createArticle($line, $editionId, $index, $topic);
     $articleId = ArticleDao::persist($article);
     AuthorImporter::import($line, $articleId);
 }