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 | Pictorials |
| --- | --- | --- | --- | --- | --- |
| 1-09 | Carmen Electra | Dasha Astafieva | Richard Branson | Marston and Cooper Hefner | Carmen Electra |
| 3-09 | Aubrey O'Day | Jennifer Pershing | Kenny Chesney | Flight of the Conchords | Aubrey O'Day |
| 4-09 | Seth Rogen , Hope Dworaczyk | Hope Dworaczyk | Seth Rogen | Amy Smart | International Playmates, Bettie Page |
| 5-09 | Lisa Rinna | Crystal McCahill | Chuck Palahniuk | Zachary Quinto | Lisa Rinna , Women of Wall Street |
| 6-09 | America Olivo | Candice Cassidy | Shia LaBeouf | Scott Boras | America Olivo, PMOY - Ida Ljungqvist |
| 9-09 | Heidi Montag | Kimberly Phillips | Seth MacFarlane | Diane Kruger | Heidi Montag. Michelle More & Suzanne Stonebarger |
| 10-09 | Kiera Gormley , Tuuli Shipster | Lindsey Gayle Evans | Woody Harrelson | Shawne Merriman | Girls of the ACC |
| 11-09 | Marge Simpson or Alina Puscau | Kelley Thompson | Benicio del Toro | Tracy Morgan | Alina Puscau , Farrah Fawcett |
Question:
How many cover models were on the edition that featured Jennifer Pershing as the centerfold?
Answer:
1.0