In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.

Example Input: Boundary value problems are similar to initial value problems. A boundary value problem has conditions specified at the extremes ('boundaries') of the independent variable in the equation whereas an initial value problem has all of the conditions specified at the same value of the independent variable (and that value is at the lower boundary of the domain, thus the term 'initial' value).
Example Output: what is initial value problem and boundary value problem

Example Input: Large-scale emigration marked most of the post-WWII period (particularly during the 1950s and 1980s), but beginning in 1987 the economy improved, and the 1990s saw the beginning of substantial economic growth. This period of growth became known as the Celtic Tiger. The Republic's real GDP grew by an average of 9.6% per annum between 1995 and 1999, in which year the Republic joined the euro. In 2000, it was the sixth-richest country in the world in terms of GDP per capita.
Example Output: when did ireland became a first world country

Example Input: Set during the Great Depression, the novel focuses on the Joads, a poor family of tenant farmers driven from their Oklahoma home by drought, economic hardship, agricultural industry changes, and bank foreclosures forcing tenant farmers out of work. Due to their nearly hopeless situation, and in part because they are trapped in the Dust Bowl, the Joads set out for California. Along with thousands of other 'Okies', they seek jobs, land, dignity, and a future.
Example Output:
what is john steinbecks book the grapes of wrath about