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:
| Outcome | Date | Tournament | Surface | Partner | Opponents | Score |
| --- | --- | --- | --- | --- | --- | --- |
| Winner | 25 September 1988 | Paris , France | Clay | Emmanuelle Derly | Louise Field Nathalie Herreman | 6–0, 6–2 |
| Runner-up | 23 September 1990 | Paris , France | Clay | Nathalie Herreman | Kristin Godridge Kirrily Sharpe | 6–4, 3–6, 1–6 |
| Winner | 5 May 1991 | Taranto , Italy | Clay | Florencia Labat | Laura Golarsa Ann Grossman | 6–2, 7–5 |
| Runner-up | 22 September 1991 | Paris , France | Clay | Julie Halard | Petra Langrová Radomira Zrubáková | 4–6, 4–6 |
| Winner | 12 July 1992 | Kitzbühel , Austria | Clay | Florencia Labat | Amanda Coetzer Wiltrud Probst | 6–3, 6–3 |
| Winner | 26 July 1992 | San Marino | Clay | Florencia Labat | Sandra Cecchini Laura Garrone | 7–6, 7–5 |
| Winner | 30 August 1992 | Schenectady , New York, USA | Hard | Florencia Labat | Ginger Helgeson Shannan McCarthy | 6–3, 1–6, 6–2 |
| Runner-up | 6 August 1995 | San Diego , California, USA | Hard | Sandrine Testud | Gigi Fernández Natalia Zvereva | 2–6, 1–6 |
| Runner-up | 5 May 1996 | Bol , Croatia | Clay | Alexandra Fusai | Laura Montalvo Paola Suárez | 7–6, 3–6, 4–6 |
| Winner | 20 April 1997 | Tokyo , Japan | Hard | Rika Hiraki | Kerry-Anne Guse Corina Morariu | 6–4, 6–2 |
| Runner-up | 16 January 1999 | Hobart , Australia | Hard | Émilie Loit | Mariaan de Swardt Elena Tatarkova | 1–6, 2–6 |
Question:
what is the surface when the opponents are louise field nathalie herreman?
Answer:
Clay