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_2140071_10 ( coach VARCHAR, premier_date VARCHAR )

### Question ###
Name the coach for may 20, 2010

### Accurate SQL ###

SELECT coach FROM table_2140071_10 WHERE premier_date = "May 20, 2010"