function runIsSingleTitle(run) {

    if (run.operators.length === 1 && !run.namedPrefix) {
        var op = run.operators[0];
        if (op.operator === "title"
        && op.operands.length === 1
        && !op.suffix
        && !op.prefix) {
            var operand = op.operands[0];
            if (!operand.variable && !operand.indirect) {
                return operand.text;
            }
        }
    }
    return null;

  }
If this is a single title, return the title, otherwise null