Question: What county contains the town where the National Historic Site for the person who was the president when the US purchased the state that has the highest population of bears?

<P0-S0> Only about 1,500 grizzlies are left in the lower 48 states of the US. <P0-S1> Of these, about 800 live in Montana. <P0-S2> About 600 more live in Wyoming, in the Yellowstone - Teton area. <P0-S3> There are an estimated 70 -- 100 grizzly bears living in northern and eastern Idaho. <P0-S4> Its original range included much of the Great Plains and the southwestern states, but it has been extirpated in most of those areas. <P0-S5> Combining Canada and the United States, grizzly bears inhabit approximately half the area of their historical range. <P0-S6> There are currently about 55,000 wild grizzly bears total located throughout North America, most of which reside in Alaska. <SEP> <P1-S0> 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. <P1-S1> The Andrew Johnson National Cemetery is a United States National Cemetery on the grounds of the Andrew Johnson National Historic Site in Greeneville, Tennessee. <SEP> <P2-S0> wardville is a small unincorporated community in northern atoka county, oklahoma, united states, along state highway 131 14 miles northeast of coalgate, oklahoma. <P2-S1> the post office was established february 6, 1902 under the name herbert, oklahoma. <P2-S2> herbert was located in atoka county, choctaw nation, a territorial-era entity which included portions of today's atoka, coal, hughes and pittsburg counties. <P2-S3> the town was named after herbert ward, who was the youngest son of the towns first postmaster, henry pleasant ward. <P2-S4> the name of the town was changed to wardville on july 18, 1907. wardville was named for the before mentioned henry pleasant ward, who served in the territorial house of representatives and senate and was an atoka county judge. <P2-S5> the wardville post office closed in 2007. <SEP> <P3-S0> 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. <P3-S1> The Alaska Purchase (Russian: Продажа Аляски, tr. <SEP> <P4-S0> ulysses s. grant national historic site is a united states national historic site located 10 miles (16 km) southwest of downtown st. louis, missouri within the municipality of grantwood village. <P4-S1> the site, also known as white haven, commemorates the life, military career, and presidency of ulysses s. grant. <P4-S2> five historic structures are preserved at the site including the childhood home of julia dent grant, wife of ulysses s. grant. <SEP> <P5-S0> The population as of the 2010 census was 15,062. <P5-S1> The town was named in honor of Revolutionary War hero Nathanael Greene. <P5-S2> It is the only town with this spelling in the United States, although there are numerous U.S. towns named "Greenville". <P5-S3> The town was the capital of the short-lived State of Franklin in the 18th-century history of the Tennessee region. <P5-S4> Greeneville is a town in, and the county seat of Greene County, Tennessee, United States.