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:
| School | Nickname | Location | Colors | Tenure |
| --- | --- | --- | --- | --- |
| Barberton | Magics | Barberton , Summit County | Purple, White | 2005–2011 |
| Coventry | Comets | Coventry Twp. , Summit County | Blue, Gold | 1969–1983 |
| Field | Falcons | Brimfield , Portage County | Red, White, Black | 1978–1990 |
| Hudson | Explorers | Hudson , Summit County | Navy Blue, White | 1949–1997 |
| Manchester | Panthers | New Franklin , Summit County | Red, Black | 1949–1976 |
| Mogadore | Wildcats | Mogadore , Portage County | Green, White | 1958–1968 |
| Norton | Panthers | Norton , Summit County | Red, Black, White | 1972–2005 |
| Twinsburg | Tigers | Twinsburg , Summit County | Blue, White | 1958–1964 |
Question:
When were the members tenured in the Field school?
Answer:
1978–1990