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 | Opponent in the final | Score in the final |
| --- | --- | --- | --- | --- | --- |
| Runner-up | 30 January 1984 | Houston , USA WTA Virginia Slims | Carpet (I) | Hana Mandlíková | 4–6, 2–6 |
| Winner | 7 May 1984 | Lugano , Switzerland WTA Virginia Slims | Clay | Iva Budařová | 6–1, 6–1 |
| Winner | 21 May 1984 | Perugia , Italy WTA Virginia Slims | Clay | Chris Evert | 6–3, 6–3 |
| Winner | 6 August 1984 | Indianapolis , USA WTA Virginia Slims | Clay | Lisa Bonder | 6–4, 6–3 |
| Winner | 12 November 1984 | Tokyo , Japan WTA Virginia Slims | Carpet (I) | Hana Mandlíková | 6–1, 1–6, 6–4 |
| Winner | 10 December 1984 | Tokyo , Japan WTA Virginia Slims | Carpet (I) | Claudia Kohde-Kilsch | 3–6, 6–4, 6–4 |
| Runner-up | 7 January 1985 | Washington , USA WTA Virginia Slims | Carpet (I) | Martina Navratilova | 3–6, 2–6 |
| Runner-up | 20 May 1985 | Lugano , Switzerland WTA Virginia Slims | Clay | Bonnie Gadusek | 4–6, 2–6 |
| Runner-up | 21 October 1985 | Brighton , UK WTA Virginia Slims | Carpet (I) | Chris Evert | 5–7, 3–6 |
| Runner-up | 11 November 1985 | Tokyo , Japan WTA Virginia Slims | Carpet (I) | Chris Evert | 5–7, 0–6 |
| Winner | 9 December 1985 | Tokyo , Japan WTA Virginia Slims | Carpet (I) | Bonnie Gadusek | 7–6 (7–2) , 3–6, 7–5 |
| Runner-up | 19 May 1986 | Lugano , Switzerland WTA Virginia Slims | Clay | Raffaella Reggi | 7–5, 3–6, 6–7 (6–8) |
| Runner-up | 9 June 1986 | Birmingham , UK WTA Virginia Slims | Grass | Pam Shriver | 2–6, 6–7 (0–7) |
| Runner-up | 8 September 1986 | Tokyo , Japan WTA Virginia Slims | Carpet (I) | Steffi Graf | 4–6, 2–6 |
| Winner | 30 March 1987 | Wild Dunes , USA WTA Virginia Slims | Clay | Raffaella Reggi | 5–7, 6–2, 6–3 |
| Runner-up | 6 April 1987 | Hilton Head Island , USA WTA Virginia Slims | Clay | Steffi Graf | 2–6, 6–4, 3–6 |
| Runner-up | 18 May 1987 | Geneva , Switzerland WTA Virginia Slims | Clay | Chris Evert | 3–6, 6–4, 2–6 |
| Winner | 24 August 1987 | Mahwah , USA WTA Virginia Slims | Hard | Sylvia Hanika | 1–6, 6–4, 6–1 |
| Runner-up | 14 September 1987 | Tokyo , Japan WTA Virginia Slims | Carpet (I) | Gabriela Sabatini | 4–6, 6–7 (6–8) |
| Winner | 29 February 1988 | Wichita , USA WTA Tier V | Hard (I) | Sylvia Hanika | 7–6 (7–5) , 7–5 |
| Winner | 12 September 1988 | Phoenix , USA WTA Tier V | Hard | Dinky Van Rensburg | 6–3, 4–6, 6–2 |
| Runner-up | 17 October 1988 | Zürich , Switzerland WTA Tier IV | Carpet (I) | Pam Shriver | 3–6, 4–6 |
| Runner-up | 24 October 1988 | Brighton , UK WTA Tier III | Carpet (I) | Steffi Graf | 2–6, 0–6 |
| Winner | 12 March 1989 | Indian Wells , USA WTA Tier III | Hard | Jenny Byrne | 6–4, 6–1 |
| Winner | 22 May 1989 | Geneva , Switzerland WTA Tier V | Clay | Conchita Martínez | 6–4, 6–0 |
| Runner-up | 12 February 1990 | Chicago , USA WTA Tier I | Carpet (I) | Martina Navratilova | 3–6, 2–6 |
| Runner-up | 27 March 1990 | San Antonio , USA WTA Tier III | Hard | Monica Seles | 4–6, 3–6 |
| Runner-up | 6 August 1990 | San Diego , USA WTA Tier III | Hard | Steffi Graf | 3–6, 2–6 |
| Winner | 11 February 1991 | Linz , Austria WTA Tier V | Carpet (I) | Petra Langrová | 6–4, 7–6 (7–1) |
| Runner-up | 22 April 1991 | Barcelona , Spain WTA Tier III | Clay | Conchita Martínez | 4–6, 1–6 |
| Winner | 20 May 1991 | Geneva , Switzerland WTA Tier IV | Clay | Helen Kelesi | 6–3, 3–6, 6–3 |
| Winner | 23 September 1991 | Bayonne , France WTA Tier IV | Carpet (I) | Leila Meskhi | 4–6, 6–3, 6–4 |
| Runner-up | 6 July 1992 | Kitzbühel , Austria WTA Tier IV | Clay | Conchita Martínez | 0–6, 6–3, 2–6 |
| Winner | 28 September 1992 | Bayonne , France WTA Tier IV | Carpet (I) | Nathalie Tauziat | 6–7 (4–7) , 6–2, 6–3 |
| Winner | 22 February 1993 | Linz , Austria WTA Tier III | Carpet (I) | Conchita Martínez | 6–2, 1–0, Ret. |
| Winner | 4 October 1993 | Zürich , Switzerland WTA Tier I | Carpet (I) | Martina Navratilova | 6–3, 7–6 (7–1) |
| Winner | 8 February 1994 | Osaka , Japan WTA Tier III | Carpet (I) | Iva Majoli | 6–1, 4–6, 7–5 |
Question:
What was the surface where the outcome was winner on 12 march 1989?
Answer:
Hard