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:
| Round | Circuit | Date | Class A Winner | Class B Winner | Class C Winner | Class D Winner |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | Snetterton Motor Racing Circuit , Norfolk | 14 April | John Love | Alan Hutcheson | None (no entries?) | Mike Parkes |
| 2 | Goodwood Circuit , West Sussex | 23 April | Christabel Carlisle | Alan Hutcheson | None (no entries) | Graham Hill |
| 3 | Aintree Motor Racing Circuit , Liverpool | 28 April | John Love | Alan Hutcheson | Nicky Byrne | Graham Hill |
| 4 | Silverstone Circuit , Northamptonshire | 12 May | John Love | Peter Harper | Innes Ireland | Graham Hill |
| 5 | Crystal Palace , London | 11 June | John Love | Peter Harper | None (no entries) | Roy Salvadori |
| NC | Goodwood Circuit , West Sussex | 11 June | Unknown. | Unknown. | Nicky Byrne | P.J. Woodroffe |
| NC | Snetterton Motor Racing Circuit , Norfolk | 15 July | Mick Clare | Alan Hutcheson | Unknown. | Graham Hill |
| 6 | Aintree Motor Racing Circuit , Liverpool | 21 July | John Love | Peter Harper | Nicky Byrne | Jack Sears |
| 7 | Brands Hatch , Kent | 6 August | John Love | Peter Jopp | David Haynes | Mike Parkes |
| 8 | Oulton Park , Cheshire | 1 September | John Love | Peter Harper | Chris McLaren? | Graham Hill |
Question:
Who was the Class D winner in round 6?
Answer:
Jack Sears