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In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.

Article: A job is more than a job,especially to the old. "It's not the money that matters,but the sense of self-worth."56-year-old Cbeng Wonlan said. So,every day Ms Cheng carries a bag of parcels,letters and documents and does her rounds in North Point. She's a courier  Five years ago.Ms Cheng was a nurse at a private clinic. She had worked there for 30 years but was Jobless when the doctor migrated. It was difficult for her to find another job as a nurse. "People do not trust my ability when they learn how old I am,"she said. After two years of searching, she eventually found another nursing job. But then after two years,she quit Why? 'My colleagues were young and they didn't understand me because of my age. They often asked me 'You are so old what are you working for? I was very unhappy" She said. So while the rest of her family left for work,she was left to lonely boredom at home .Then her neighbours told her about Employee's Retraining Board(ERB)offering retraining courses for older people. These courses are specifically designed to encourage the older people back to work. "I was interested in courier work. I didn't think my age was a barrier because I was fit." She said .Upon graduating,Ms Cheng was offered a job by the Speeding Shuttle Courier Service Company. But then Ms Cheng was faced with a conflict:she was caught between honour and employment"I felt embarrassed about carrying and delivering letters and parcels." she said. It took Ms Cheng 24 hours to make up her mind:there was nothing wrong or embarrassing about doing the job. So she went off to work as a courier. Ms Cheng's employer is delighted with her responsible attitude and said."I hired older people because they were able and reliable .Age is not an important factor but attitude is Many old people will not run from difficulties but the young ones will" 
 Answer: People didn't think she had enough work experience
Output:
Why was it difficult for Ms Cheng to find another nursing Job?