Question: What is the county having the city containing the National Historic Site of the president of the state housing Tana Glacier when the state was purchased?

full_context: Document 1: Yahtse Glacier: Yahtse Glacier is a 40-mile-long (64 km) glacier in the U.S. state of Alaska. It begins on the southeast slope of Mount Miller and trends southeast along the north border of Guyot Glacier to Icy Bay, just east of Guyot Hills and 70 miles (113 km) northwest of Yakutat. The western extent is an icefield. The name derives from the Yahtse River and was adopted after the retreat of Guyot Glacier resulted in a separate branch.
Document 2: Tennessee: In 1864, Andrew Johnson (a War Democrat from Tennessee) was elected Vice President under Abraham Lincoln. He became President after Lincoln's assassination in 1865. Under Johnson's lenient re-admission policy, Tennessee was the first of the seceding states to have its elected members readmitted to the U.S. Congress, on July 24, 1866. Because Tennessee had ratified the Fourteenth Amendment, it was the only one of the formerly secessionist states that did not have a military governor during the Reconstruction period.
Document 3: Alaska Purchase: The Alaska Purchase (Russian: Продажа Аляски, tr. Prodazha Alyaski) was the United States' acquisition of Alaska from the Russian Empire on March 30, 1867, by a treaty ratified by the United States Senate, and signed by President Andrew Johnson.
Document 4: Andrew Johnson National Historic Site: The cemetery also includes the interments of Johnson's wife, Eliza McCardle Johnson, and son Brigadier General Robert Johnson Henderson. David T. Patterson, a United States Senator from Tennessee, and his son Andrew J. Patterson, who was instrumental in securing historic designation for the Greeneville properties associated with Andrew Johnson, were among others buried in the cemetery. The site was authorized by Congress as a U.S. National Monument in 1935, established on April 27, 1942, and redesignated a National Historic Site on December 11, 1963.
Document 5: Nashville, Tennessee: The town of Nashville was founded by James Robertson, John Donelson, and a party of Overmountain Men in 1779, near the original Cumberland settlement of Fort Nashborough. It was named for Francis Nash, the American Revolutionary War hero. Nashville quickly grew because of its strategic location, accessibility as a port on the Cumberland River, a tributary of the Ohio River; and its later status as a major railroad center. By 1800, the city had 345 residents, including 136 African American slaves and 14 free blacks. In 1806, Nashville was incorporated as a city and became the county seat of Davidson County, Tennessee. In 1843, the city was named the permanent capital of the state of Tennessee.
Document 6: Alaska Purchase: Russia continued to see an opportunity to weaken British power by causing British Columbia, including the Royal Navy base at Esquimalt, to be surrounded or annexed by American territory. Following the Union victory in the Civil War, the Tsar instructed the Russian minister to the United States, Eduard de Stoeckl, to re-enter into negotiations with William H. Seward in the beginning of March 1867. President Johnson was entangled in negotiations about Reconstruction and Seward had alienated a number of Republicans, so they believed that the purchase would help divert attention from the domestic issues. The negotiations concluded after an all - night session with the signing of the treaty at 04: 00 on March 30, 1867, with the purchase price set at $7.2 million ($105 million in 2016), or about 2 cents per acre ($4.74 / km).
Document 7: Tennessee: The modern spelling, Tennessee, is attributed to James Glen, the governor of South Carolina, who used this spelling in his official correspondence during the 1750s. The spelling was popularized by the publication of Henry Timberlake's "Draught of the Cherokee Country" in 1765. In 1788, North Carolina created "Tennessee County", the third county to be established in what is now Middle Tennessee. (Tennessee County was the predecessor to current-day Montgomery County and Robertson County.) When a constitutional convention met in 1796 to organize a new state out of the Southwest Territory, it adopted "Tennessee" as the name of the state.
Document 8: Greeneville, Tennessee: Greeneville is a town in, and the county seat of Greene County, Tennessee, United States. The population as of the 2010 census was 15,062. The town was named in honor of Revolutionary War hero Nathanael Greene. It is the only town with this spelling in the United States, although there are numerous U.S. towns named "Greenville". The town was the capital of the short-lived State of Franklin in the 18th-century history of the Tennessee region.
Document 9: Andrew Johnson National Cemetery: The Andrew Johnson National Cemetery is a United States National Cemetery on the grounds of the Andrew Johnson National Historic Site in Greeneville, Tennessee. Established in 1906, the cemetery was built around the resting place of Andrew Johnson, the 17th President of the United States, and holds more than two thousand graves.
Document 10: Alatna River: The river is very popular for float trips due to its calm flow and wonderful scenery. Float trips usually take from four to fourteen days, depending on put-in spot and pick-up spot, and also weather/river conditions. One common place to put in is Circle Lake, a small lake which is float plane accessible and is located in a beautiful part of the valley. Another place to put in is Takahula Lake, a larger, float-plane accessible lake, further downstream from Circle Lake. Gaedeke Lake is also a possible put in spot, but according to the "Alaska River Guide", this upstream section near the headwaters of the river is shallow and rocky making portaging or lining necessary. Most floaters take out at the village of Allakaket.
Document 11: Alaska Purchase: Russia continued to see an opportunity to weaken British power by causing British Columbia, including the Royal Navy base at Esquimalt, to be surrounded or annexed by American territory. Following the Union victory in the civil war, the Tsar instructed the Russian minister to the United States, Eduard de Stoeckl, to re-enter into negotiations with William Seward in the beginning of March 1867. President Johnson was entangled in negotiations about Reconstruction and Seward had alienated a number of Republicans, so they believed that the purchase would help divert attention from the current domestic matters. The negotiations concluded after an all - night session with the signing of the treaty at 04: 00 on March 30, 1867, with the purchase price set at $7.2 million ($123 million today), or about 2 cents per acre ($4.74 / km).
Document 12: Jonesborough, Tennessee: Jonesborough (historically also Jonesboro) is a town in, and the county seat of, Washington County, Tennessee, in the southeastern United States. The population was 5,975 at the 2010 census. It is "Tennessee's oldest town".
Document 13: Little Susitna River: Little Susitna River heads at Mint Glacier on Montana Peak, in Talkeetna Mountains at , flows southwest to Cook Inlet, west of Anchorage, Alaska Cook Inlet Low.
Document 14: Alaska Purchase: The Alaska Purchase (Russian: Продажа Аляски, tr. Prodazha Alyaski) was the United States' acquisition of Alaska from the Russian Empire on March 30, 1867, by a treaty ratified by the United States Senate, and signed by president Andrew Johnson.
Document 15: Tana Glacier: Tana Glacier is a 17-mile-long (27 km) glacier in the U.S. state of Alaska. It begins at Bagley Icefield and flows northwest to its 1950 terminus near the head of the Tana River. Its name, of Alaska Native origin, was first recorded by prospectors in 1900.
ground_truth: Greene County
sub_queries: What state is Tana Glacier located? Answer: Alaska
who was the president when Alaska was purchased Answer: Andrew Johnson
Andrew Johnson National Historic Site >> located in the administrative territorial entity Answer: Greeneville
Greeneville >> located in the administrative territorial entity Answer: Greene County