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:
| Date | Cover model | Centerfold model | Interview subject | 20 Questions |
| --- | --- | --- | --- | --- |
| 1-03 | Tia Carrere | Rebecca Anne Ramos | Halle Berry | Ron Insana |
| 2-03 | Alison Eastwood | Charis Boyle | Jimmy Kimmel | Bernie Mac |
| 3-03 | Dorismar | Pennelope Jimenez | Colin Farrell | Juliette Lewis |
| 4-03 | Carmen Electra | Carmella DeCesare | Jay-Z | Andy Richter |
| 5-03 | Torrie Wilson | Laurie Fetter | Billy Bob Thornton | Jorja Fox |
| 6-03 | Sarah Kozer | Tailor James | Mike Piazza | Nelly |
| 7-03 | Nikki Ziering | Marketa Janska | Lisa Marie Presley | Rachel Weisz |
| 8-03 | Jenna Morasca , Heidi Strobel | Colleen Marie | Tobey Maguire | Charles Rangel |
| 9-03 | Signe Nordli | Luci Victoria | Jon Gruden | Nicolas Cage |
| 10-03 | Lauren Hill | Audra Lynn | O.J. Simpson | Joe Rogan |
| 11-03 | Daryl Hannah | Divini Rae | Quentin Tarantino | Bill Murray |
| 12-03 | Shannen Doherty | Deisy Teles and Sarah Teles | John Cusack | William H. Macy |
Question:
Who was the Cover model when the Centerfold Model was Marketa Janska?
Answer:
Nikki Ziering