But at that time , people who had knowledge on various fields , were able to find jobs in the surviving field .
But at that time , people who had knowledge in various fields , were able to find jobs in the surviving field . But , at that time , people who had knowledge on various fields were able to find jobs in the surviving fields . But at that time , people who had knowledge in various fields were able to find jobs in the surviving field . At that time , people who had knowledge on various fields were able to find jobs in the surviving field .