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 | Year | Championship | Surface | Partner | Opponents in final | Score in final |
| --- | --- | --- | --- | --- | --- | --- |
| Runner-up | 1988.0 | US Open | Hard | Jill Hetherington | Gigi Fernández Robin White | 6–4, 6–1 |
| Runner-up | 1989.0 | Australian Open | Hard | Jill Hetherington | Martina Navrátilová Pam Shriver | 3-6, 6-3, 6-2 |
| Runner-up | 1990.0 | Australian Open | Hard | Mary Joe Fernandez | Jana Novotná Helena Suková | 7–6(5), 7–6(6) |
| Winner | 1991.0 | Australian Open | Hard | Mary Joe Fernandez | Gigi Fernández Jana Novotná | 7–6(4), 6–1 |
| Runner-up | 1994.0 | Australian Open | Hard | Meredith McGrath | Gigi Fernández Natalia Zvereva | 6–3, 4–6, 6–4 |
Question:
What is Opponents in Final, when Partner is "Jill Hetherington", and when Year is after 1988?
Answer:
Martina Navrátilová Pam Shriver