if (s2 == null || p2 == null || o2 == null) {
throw new DatabaseException("Did not find matching statement from bijection for (" + s1 +","+p1+","+o1+"), got (" + s2 +","+p2+","+o2+")");
if (s2 == null || p2 == null || o2 == null) {
throw new DatabaseException("Did not find matching statement from bijection for (" + s1 +","+p1+","+o1+"), got (" + s2 +","+p2+","+o2+")");