code: private void setPropertyFilters(String filters) {
  		this.filterProperties = new HashSet<>();
  		if (!"-".equals(filters)) {
  			for (String pid : filters.split(",")) {
  				this.filterProperties.add(Datamodel
  						.makeWikidataPropertyIdValue(pid));
  			}
  		}
  	}
docs: Sets the set of property filters based on the given string.
  
  @param filters
  comma-separates list of property ids, or "-" to filter all
  statements