public void setSourceText(String sourceText) {
			if( !sourceText.equals(AlchemyAPI_NamedEntityParams.CLEANED) && !sourceText.equals(AlchemyAPI_NamedEntityParams.CLEANED_OR_RAW) 
					&& !sourceText.equals(AlchemyAPI_NamedEntityParams.RAW) && !sourceText.equals(AlchemyAPI_NamedEntityParams.CQUERY)
					&& !sourceText.equals(AlchemyAPI_NamedEntityParams.XPATH))
			{
				throw new RuntimeException("Invalid setting " + sourceText + " for parameter sourceText");
			}
			this.sourceText = sourceText;
		}