public void insertAnnotString(String variableName, String property, String annotValue){
StringBuffer buffer = new StringBuffer();
buffer.append("INSERT INTO GRAPH ").append(RICORDO).append(SPACE);
buffer.append("{ <").append(variableName).append("> <http://biomodels.net/biology-qualifiers/").append(property).append("> <").append(annotValue).append("> }");
VirtuosoUpdateRequest vur = VirtuosoUpdateFactory.create(buffer.toString(), graph);
System.out.println(buffer.toString());
vur.exec();
}