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 | City | Team Name | County | Year Joined | Year Left |
| --- | --- | --- | --- | --- | --- |
| Aurora | Aurora | Red Devils | 15 Dearborn | 1956 | 1978 |
| Brookville | Brookville | Greyhounds | 24 Franklin | 1956 1973 | 1966 1989 |
| Cambridge City | Cambridge City | Wampus Cats | 89 Wayne | 1956 | 1962 |
| Hagerstown | Hagerstown | Tigers | 89 Wayne | 1956 | 1962 |
| North Dearborn | Guilford | Vikings | 15 Dearborn | 1962 | 1973 |
| North Vernon | North Vernon | Panthers | 40 Jennings | 1962 | 1968 |
| Jennings County | North Vernon | Panthers | 40 Jennings | 1968 | 1973 |
Question:
What year did a team from North Dearborn leave?
Answer:
1973.0