instruction:
In this task, you are given a question and a context passage. You have to answer the question based on the given passage.
question:
Why did farmers have to leave?, Context: During the 1930s, parts of the state began suffering the consequences of poor farming practices, extended drought and high winds. Known as the Dust Bowl, areas of Kansas, Texas, New Mexico and northwestern Oklahoma were hampered by long periods of little rainfall and abnormally high temperatures, sending thousands of farmers into poverty and forcing them to relocate to more fertile areas of the western United States. Over a twenty-year period ending in 1950, the state saw its only historical decline in population, dropping 6.9 percent as impoverished families migrated out of the state after the Dust Bowl.
answer:
the consequences of poor farming practices, extended drought and high winds


question:
What needs consistency?, Context: The simplest valve gears give events of fixed length during the engine cycle and often make the engine rotate in only one direction. Most however have a reversing mechanism which additionally can provide means for saving steam as speed and momentum are gained by gradually "shortening the cutoff" or rather, shortening the admission event; this in turn proportionately lengthens the expansion period. However, as one and the same valve usually controls both steam flows, a short cutoff at admission adversely affects the exhaust and compression periods which should ideally always be kept fairly constant; if the exhaust event is too brief, the totality of the exhaust steam cannot evacuate the cylinder, choking it and giving excessive compression ("kick back").[citation needed]
answer:
exhaust and compression periods


question:
Who was asian?, Context: Past faculty have also included Egyptologist James Henry Breasted, mathematician Alberto Calderón, Nobel prize winning economist and classical liberalism defender Friedrich Hayek, meteorologist Ted Fujita, chemists Glenn T. Seaborg, the developer of the actinide concept and Nobel Prize winner Yuan T. Lee, Nobel Prize winning novelist Saul Bellow, political philosopher and author Allan Bloom, cancer researchers Charles Brenton Huggins and Janet Rowley, astronomer Gerard Kuiper, one of the most important figures in the early development of the discipline of linguistics Edward Sapir, and the founder of McKinsey & Co., James O. McKinsey.
answer:
Yuan T. Lee