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 | Location | Mascot | Enrollment | IHSAA Class | # / County | Year joined | Previous conference |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Manchester | North Manchester | Squires | 434.0 | AA | 85 Wabash | 1976.0 | Northern Lakes |
| Northfield | Wabash | Norsemen | 380.0 | AA | 85 Wabash | 1971.0 | none (new school) |
| North Miami | Denver | Warriors | 348.0 | A | 52 Miami | 1971.0 | Mid-Indiana |
| Rochester Community | Rochester | Zebras | 615.0 | AAA | 25 Fulton | 1987.0 | Northern Lakes |
| Southwood | Wabash | Knights | 427.0 | AA | 85 Wabash | 1976.0 | Mid-Indiana |
| Tippecanoe Valley | Akron | Vikings | 600.0 | AAA | 43 Kosciusko | 1976.0 | Independents |
| Wabash | Wabash | Apaches | 455.0 | AA | 85 Wabash | 2006.0 | Central Indiana |
| Whitko | South Whitley | Wildcats | 613.0 | AA | 92 Whitley | 1976.0 | Independents |
Question:
Which Previous conference has a Year joined smaller than 1976, and an IHSAA Class of A?
Answer:
Mid-Indiana