code: public static void findSomeStringProperties(ApiConnection connection)
  			throws MediaWikiApiErrorException, IOException {
  		WikibaseDataFetcher wbdf = new WikibaseDataFetcher(connection, siteIri);
  		wbdf.getFilter().excludeAllProperties();
  		wbdf.getFilter().setLanguageFilter(Collections.singleton("en"));
  
  		ArrayList<PropertyIdValue> stringProperties = new ArrayList<>();
  
  		System.out
  				.println("*** Trying to find string properties for the example ... ");
  		int propertyNumber = 1;
  		while (stringProperties.size() < 5) {
  			ArrayList<String> fetchProperties = new ArrayList<>();
  			for (int i = propertyNumber; i < propertyNumber + 10; i++) {
  				fetchProperties.add("P" + i);
  			}
  			propertyNumber += 10;
  			Map<String, EntityDocument> results = wbdf
  					.getEntityDocuments(fetchProperties);
  			for (EntityDocument ed : results.values()) {
  				PropertyDocument pd = (PropertyDocument) ed;
  				if (DatatypeIdValue.DT_STRING.equals(pd.getDatatype().getIri())
  						&& pd.getLabels().containsKey("en")) {
  					stringProperties.add(pd.getEntityId());
  					System.out.println("* Found string property "
  							+ pd.getEntityId().getId() + " ("
  							+ pd.getLabels().get("en") + ")");
  				}
  			}
  		}
  
  		stringProperty1 = stringProperties.get(0);
  		stringProperty2 = stringProperties.get(1);
  		stringProperty3 = stringProperties.get(2);
  		stringProperty4 = stringProperties.get(3);
  		stringProperty5 = stringProperties.get(4);
  
  		System.out.println("*** Done.");
  	}
docs: Finds properties of datatype string on test.wikidata.org. Since the test
  site changes all the time, we cannot hardcode a specific property here.
  Instead, we just look through all properties starting from P1 to find the
  first few properties of type string that have an English label. These
  properties are used for testing in this code.
  
  @param connection
  @throws MediaWikiApiErrorException
  @throws IOException