public static String defineDnType(HashMap<String,List<String>> pDictionary) {
		
		// DataNode type
		List<String> dnTypeList = pDictionary.get("http://www.w3.org/1999/02/22-rdf-syntax-ns#type"); 

		if (dnTypeList.toString().contains("Rna")) {allVars.put("dnType", "Rna");}
		else if (dnTypeList.toString().contains("Pathway")) {allVars.put("dnType", "Pathway");}
		else if (dnTypeList.toString().contains("Protein")) {allVars.put("dnType", "Protein");} 
		else if (dnTypeList.toString().contains("Complex")) {allVars.put("dnType", "Complex");} 
		else if (dnTypeList.toString().contains("Metabolite")) {allVars.put("dnType", "Metabolite");}
		else if (dnTypeList.toString().contains("GeneProduct")) {allVars.put("dnType", "GeneProduct");}
		else {allVars.put("dnType", "Unknown");}

		
		return null;
	}