Given the task definition, example input & output, solve the new input case.
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.
Example: Article: There are a lot of public libraries in Britain. These libraries have more than one hundred and fifteen million books, not including those libraries of public schools. Public libraries not only lend books, music records but also help children, patients in hospitals and others to get special play readings, film shows and so on. The first public libraries were founded in about the year 1850. Today's public libraries usually have a reading-room, a lending room and a reference room. The greatest and most famous library in Britain is that of the British Library in London. It was founded in 1973 and has over 10, 000, 000 books. It has nearly every magazine, newspaper and book published in Britain and other parts across the world.
Answer: 10,000,000 or less.
Output: How many books are there in the British Library?
In the Article, 10,000,000 is mentioned for the number of books available in the British Library, so this is a good question.

New input case for you: Article: The State Council submitted a bill which aims to allow couples to have two children if either parent is an only child. It focuses on adjusting and improving the family planning policy. The State Council argues adjustment to the policy in the face of a steadily declining birth rate. The birth rate has remained relatively low and shows a tendency to fall further. The rate has dropped to between 1.5 and 1.6 since the 1990s, which means each Chinese woman of child-bearing age gives birth to 1.5 to 1.6 children on average. The working population began to drop in 2012 by 3.45 million every year, and it is likely to fall by 8 million each year after 2023. The population aged 60 and above will reach 400 million and account for one-fourth of the total population in the early 2030s, up from one-seventh now. "If the current family planning policy continues, the birth rate will continue to fall and lead to a sharp drop of the total population after reaching a peak," said Li Bin, minister in charge of the National Health and Family Planning Commission. "It is the right time to make changes: The low birth rate is stable, the working population is still large and the burden of supporting the elderly remains relatively light," he added. An increase in birth is expected if the policy changes but will not seriously affect the food supply, public education, health care or employment. China's food safety and public service plans are designed to meet the needs of 1.43 billion population in 2020 and 1.5 billion in 2033. Even with the policy change, the total population will reach no more than 1.38 billion in 2015, Li said.
Answer: To solve the social population issue.
Output:
Why did the State Council submit the bill?