Task: Question Generation
Input (English): Passage: Following a brief post-war downturn, boom times returned to Jerome in the 1920s. Copper prices rose to 24 cents a pound in 1929, and United Verde and UVX operated at near capacity. Wages rose, consumers spent, and the town's businesses—including five automobile dealerships—prospered. United Verde, seeking stable labor relations, added disability and life insurance benefits for its workers and built a baseball field, tennis courts, swimming pools, and a public park in Jerome. Both companies donated to the Jerome Public Library and helped finance projects for the town's schools, churches, and hospitals.In 1930, after the start of the Great Depression, the price of copper fell to 14 cents a pound. In response, United Verde began reducing its work force; UVX operated at a loss, and the third big mine, Verde Central, closed completely. The price of copper fell further in 1932 to 5 cents a pound, leading to layoffs, temporary shut-downs, and wage reductions in the Verde District. In 1935, the Clark family sold United Verde to Phelps Dodge, and in 1938 UVX went out of business.
Meanwhile, a subsidence problem that had irreparably damaged at least 10 downtown buildings by 1928 worsened through the 1930s. Dozens of buildings, including the post office and jail, were lost as the earth beneath them sank away. Contributing causes were geologic faulting in the area, blast vibrations from the mines, and erosion that may have been exacerbated by vegetation-killing smelter smoke.Mining continued at a reduced level in the Verde District until 1953, when Phelps Dodge shut down the United Verde Mine and related operations. Jerome's population subsequently fell below 100. To prevent the town from disappearing completely, its remaining residents turned to tourism and retail sales. They organized the Jerome Historical Society in 1953 and opened a museum and gift shop.To encourage tourism, the town's leaders sought National Historic Landmark status for Jerome; it was granted by the federal government in 1967. In 1962, the heirs of James Douglas donated the Douglas mansion, above the UVX mine site, to the State of Arizona, which used it to create Jerome State Historic Park. By sponsoring music festivals, historic-homes tours, celebrations, and races, the community succeeded in attracting visitors and new businesses, which in the 21st century include art galleries, craft stores, wineries, coffee houses, and restaurants.
Output (English): What year was the town that had its population dip under 100 granted National Historic Landmark status?