// has to be called first. Other methods
//checkMandatoryParams(params, mandatoryEXPL);
SearchSessionFactory search_session_factory = getSearchSession(context);
ExplainInformationDTO explain = search_session_factory.explain();
Hashtable<String, Boolean> seenContextSets = new Hashtable<String, Boolean>();
Element response = new Element(Jeeves.Elem.RESPONSE);