Fairfax Media's stock price falls to new record lows after t

Fairfax Media's stock price falls to new record lows after the company's largest shareholder Gina Rinehart —— raised the prospect of selling out should she not secure seats on the board "without unsuitable conditions".
哪位亲可以帮忙解释一下破折号后面到底要表达什么意思?非常感谢!