With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: April was the month when the House of 1000 Corpses had a theatrical release.
text_B: The Great Smoky Mountains are a mountain range rising along the Tennessee -- North Carolina border in the southeastern United States .. mountain range. mountain range. Tennessee. Tennessee. North Carolina. North Carolina. They are a subrange of the Appalachian Mountains , and form part of the Blue Ridge Physiographic Province .. Appalachian Mountains. Appalachian Mountains. Blue Ridge Physiographic Province. Blue Ridge Mountains. The range is sometimes called the Smoky Mountains and the name is commonly shortened to the Smokies .. The Great Smokies are best known as the home of the Great Smoky Mountains National Park , which protects most of the range .. Great Smoky Mountains National Park. Great Smoky Mountains National Park. The park was established in 1934 , and , with over 9 million visits per year , it is the most-visited national park in the United States .. The Great Smokies are part of an International Biosphere Reserve .. International Biosphere Reserve. International Biosphere Reserve. The range is home to an estimated 187000 acre of old growth forest , constituting the largest such stand east of the Mississippi River .. old growth. old growth. Mississippi River. Mississippi River. The cove hardwood forests in the range 's lower elevations are among the most diverse ecosystems in North America , and the Southern Appalachian spruce-fir forest that coats the range 's upper elevations is the largest of its kind .. cove. cove ( Appalachian Mountains ). Southern Appalachian spruce-fir forest. Southern Appalachian spruce-fir forest. The Great Smokies are also home to the densest black bear population in the Eastern United States and the most diverse salamander population outside of the tropics .. black bear. American black bear. salamander. salamander. Along with the Biosphere reserve , the Great Smokies have been designated a UNESCO World Heritage Site .. UNESCO. UNESCO. World Heritage Site. World Heritage Site. The U.S. National Park Service preserves and maintains 78 structures within the national park that were once part of the numerous small Appalachian communities scattered throughout the range 's river valleys and coves .. National Park Service. National Park Service. 78 structures within the national park. List of historical structures maintained by the Great Smoky Mountains National Park. The park contains five historic districts and nine individual listings on the National Register of Historic Places .. National Register of Historic Places. National Register of Historic Places. The name `` Smoky '' comes from the natural fog that often hangs over the range and presents as large smoke plumes from a distance .. This fog is caused by the vegetation exhaling volatile organic compounds , chemicals that have a high vapor pressure and easily form vapors at normal temperature and pressure .. volatile organic compounds. volatile organic compounds. As a result of the 2016 Great Smoky Mountains wildfires , the Great Smoky Mountains have received international media coverage .. 2016 Great Smoky Mountains wildfires. 2016 Great Smoky Mountains wildfires
not_related.