Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Artist | Country of origin | Period active | Release-year of first charted record | Genre | Claimed sales |
| --- | --- | --- | --- | --- | --- |
| Metallica | United States | 1981–present | 1983.0 | Heavy metal / Thrash metal | 110 million |
| Taylor Swift | United States | 2006–present | 2006.0 | Country / Country pop / Pop / Pop-rock | 101 million |
| Eminem | United States | 1996–present | 1999.0 | Hip hop | 100 million |
| Britney Spears | United States | 1998–present | 1998.0 | Pop / Dance / Dance-pop | 100 million |
| Rod Stewart | United Kingdom | 1964–present | 1969.0 | Rock / Pop | 100 million |
| Bon Jovi | United States | 1983–present | 1983.0 | Hard rock / Glam metal | 100 million |
| Fleetwood Mac | United Kingdom United States | 1967–present | 1968.0 | Rock / Pop | 100 million |
| Backstreet Boys | United States | 1993–present | 1995.0 | Pop | 100 million |
| Guns N' Roses | United States | 1985–present | 1987.0 | Hard rock / Heavy metal | 100 million |
| Prince | United States | 1976–present | 1978.0 | Funk / R&B / Pop / Soul / Rock | 100 million |
| Kenny Rogers | United States | 1958–present | 1975.0 | Country / Pop | 100 million |
| Paul McCartney | United Kingdom | 1960–present | 1970.0 | Rock | 100 million |
| Janet Jackson | United States | 1982–present | 1982.0 | R&B / Pop | 100 million |
| Chicago | United States | 1967–present | 1969.0 | Rock / Pop | 100 million |
| The Carpenters | United States | 1969–1983 | 1969.0 | Pop | 100 million |
| Bob Dylan | United States | 1959–present | 1963.0 | Folk / Rock | 100 million |
| George Michael | United Kingdom | 1981–present | 1984.0 | Pop | 100 million |
| Bryan Adams | Canada | 1979–present | 1979.0 | Rock | 100 million |
| Def Leppard | United Kingdom | 1977–present | 1979.0 | Hard rock / Heavy metal | 100 million |
| Cher | United States | 1964–present | 1965.0 | Pop / Rock / Dance / Folk | 100 million |
| Lionel Richie | United States | 1968–present | 1981.0 | Pop / R&B | 100 million |
| Olivia Newton-John | Australia | 1966–present | 1966.0 | Pop | 100 million |
| Linda Ronstadt | United States | 1967–present | 1968.0 | Rock / Folk / Country | 100 million |
| Stevie Wonder | United States | 1961–present | 1962.0 | Funk / R&B / Soul | 100 million |
| Tina Turner | United States | 1955–present | 1975.0 | Rock / Pop | 100 million |
| The Beach Boys | United States | 1961–present | 1962.0 | Rock / Pop / Surf Rock | 100 million |
| Kiss | United States | 1972–present | 1974.0 | Hard rock / Heavy metal | 100 million |
| The Who | United Kingdom | 1964–present | 1965.0 | Rock / Hard rock | 100 million |
| Johnny Hallyday | France | 1957–2007 | 1960.0 | Rock / Pop | 100 million |
| Barry White | United States | 1972–2003 | 1973.0 | R&B / Soul | 100 million |
Question:
What is the Genre, when the Release-year of first charted record is 1968, and when the Country of origin is United States?
Answer:
Rock / Folk / Country