protected function execute(InputInterface $input, OutputInterface $output)
 {
     $user = $input->getOption('user');
     $userDetails = $this->appConfig->offsetGet('users.' . $user);
     if ($userDetails === null) {
         throw new RuntimeException('User not found in config');
     }
     $wiki = $input->getOption('wiki');
     $wikiDetails = $this->appConfig->offsetGet('wikis.' . $wiki);
     if ($wikiDetails === null) {
         throw new RuntimeException('Wiki not found in config');
     }
     $sparql = $input->getOption('sparql');
     if ($sparql === null || empty($sparql)) {
         throw new RuntimeException('SPARQL endpoint must be passed');
     }
     $this->setServices($wikiDetails['url'], $sparql);
     $propertyString = $input->getOption('property');
     $property = new PropertyId($propertyString);
     if ($propertyString === null || $propertyString === '' || $property === null) {
         throw new RuntimeException('No property given');
     }
     $output->writeln('Running SPARQL query to find items to check');
     $queryBuilder = new QueryBuilder(array('wdt' => 'http://www.wikidata.org/prop/direct/'));
     $itemIds = $this->sparqlQueryRunner->getItemIdsFromQuery($queryBuilder->select('?item')->where('?item', 'wdt:' . $propertyString, '?value')->limit(10000)->__toString());
     $loggedIn = $this->wikibaseApi->login(new ApiUser($userDetails['username'], $userDetails['password']));
     if (!$loggedIn) {
         $output->writeln('Failed to log in to wikibase wiki');
         return -1;
     }
     $itemLookup = $this->wikibaseFactory->newItemLookup();
     $statementRemover = $this->wikibaseFactory->newStatementRemover();
     foreach ($itemIds as $itemId) {
         $item = $itemLookup->getItemForId($itemId);
         foreach ($item->getStatements()->getIterator() as $statement) {
             if ($statement->getPropertyId()->equals($property)) {
                 $statementRemover->remove($statement, new EditInfo('Removing Statement'));
             }
         }
     }
     return 0;
 }