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:
| Position | Player | County team | Club team(s) | Team Number |
| --- | --- | --- | --- | --- |
| Goalkeeper | Tony Reddin | Tipperary (1947–1957) | Mullagh (Galway) Lorrha (Tipperary) | 1.0 |
| Right corner-back | Bobby Rackard | Wexford (1945–1957) | Rathnure | 2.0 |
| Full-back | Nick O'Donnell | Wexford (1951–1960) | Éire Óg (Kilkenny) St. Aidan's (Wexford) | 3.0 |
| Left corner-back | John Doyle | Tipperary (1949–1967) | Holycross-Ballycahill | 4.0 |
| Right wing-back | Jimmy Finn | Tipperary (1950–1959) | Borris-Ileigh | 5.0 |
| Centre-back | John Keane | Waterford (1935–1951) | Mount Sion | 6.0 |
| Left wing-back | Paddy Phelan | Kilkenny (1931–1940) | Tullaroan | 7.0 |
| Midfield | Lory Meagher | Kilkenny (1924–1935) | Tullaroan | 8.0 |
| Midfield | Jack Lynch | Cork (1936–1950) | Glen Rovers | 9.0 |
| Right wing-forward | Christy Ring | Cork (1940–1962) | Glen Rovers | 10.0 |
| Centre-forward | Mick Mackey | Limerick (1930–1946) | Ahane | 11.0 |
| Left wing-forward | Jim Langton | Kilkenny (1939–1950) | Éire Óg | 12.0 |
| Right corner-forward | Jimmy Doyle | Tipperary (1957–1973) | Thurles Sarsfields | 13.0 |
| Full-forward | Nicky Rackard | Wexford (1940–1956) | Rathnure | 14.0 |
| Left corner-forward | Eddie Keher | Kilkenny (1959–1977) | Rower-Inistioge | 15.0 |
Question:
Which position has john keane as the player?
Answer:
Centre-back