} catch ( Exception $e ) {
$this->output( "Data of revision with {$idCol}={$row->$idCol} unavailable!\n" );
} catch ( Exception $e ) {
$this->output( "Data of revision with {$idCol}={$row->$idCol} unavailable!\n" );
} catch ( Exception $e ) {
$this->output( "Text of revision with timestamp {$row->ar_timestamp} unavailable!\n" );
} catch ( Exception $e ) {
$this->output( "Text of revision with timestamp {$row->ar_timestamp} unavailable!\n" );