code: private Value parse(String line) {
          int i = line.indexOf(" : ");
          if (i == -1) {
              throw new IllegalArgumentException("Malformed line in RI Query "
                      + "result (expected ' : ' delimiter): '" + line + "'");
          } else {
              return NTriplesUtil.parseValue(line.substring(i + 3), factory);
          }
      }
docs: Parse a query result value of the form "name : NTriplesValue"