Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_261913_1 ( founded INTEGER, joined VARCHAR )

### Question ###
What was the earliest date an institution was founded that joined in 1977?

### Accurate SQL ###

SELECT MIN(founded) FROM table_261913_1 WHERE joined = "1977"