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 |
| --- | --- | --- | --- | --- | --- |
| The Beatles | United Kingdom | 1960–1970 | 1962.0 | Rock / Pop | 600 million |
| Elvis Presley | United States | 1954–1977 | 1954.0 | Rock and roll / Pop / Country | 600 million 500 million |
| Michael Jackson [Note 2 ] | United States | 1964–2009 | 1971.0 | Pop / Rock / Dance / R&B | 400 million 350 million 300 million |
| Madonna | United States | 1979–present | 1982.0 | Pop / Rock / Dance | 300 million 275 million |
| Elton John | United Kingdom | 1964–present | 1969.0 | Pop / Rock | 300 million 250 million |
| Led Zeppelin | United Kingdom | 1968–1980 | 1969.0 | Hard rock / Heavy metal | 300 million 200 million |
| Pink Floyd | United Kingdom | 1965–1996 | 1967.0 | Progressive rock | 250 million 200 million |
Question:
What genre is Led Zeppelin?
Answer:
Hard rock / Heavy metal