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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: 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.
Solution: How many books are there in the British Library?
Why? 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: Article: Penelope Leach, a famous British psychologist once said: "Loving a child is a round business. The more you give, the more you get, the more you want to give." Her clever remark about parent-child relationship proves to be true of my blooded family. Born in 1928 and as the youngest of 5 children, I learned to share everything with my brothers and sisters including my parents' love. Raising 5 children during the difficult times of the Great Depression took its toll on my parents' relationship and resulted in their divorce when I was 18 years old. Daddy never had very close relationships with his children and drifted even farther away from us after the divorce. After some years, an amazing woman entered into his life, and they were married. She had two sons, one of them still at home. Under her influence, we became a "fixed family" and a good relationship developed between the two families. She has always treated us as if we were her own children. Father and our stepmother shared life over twenty-five years together before our father passed away. At the time of his death, a question came up. It's about my mother, Daddy's first wife, attending his funeral. I will never forget the unconditional love shown by my stepmother when I asked her if she would object to Mother attending Daddy's funeral. Without giving it a second thought, she immediately replied, "Of course not, Honey. She's the mother of my children."
Answer: The difficulties from keeping a big family in a hard period of time.
Solution:
According to the speaker, what contributed to her parents' divorce?