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_6593 ( "Locomotive" text, "Delivered as" text, "Entered service" text, "Owner" text, "Status" text )

### Question ###
What is the Entered service date of the T413?

### Accurate SQL ###

SELECT "Entered service" FROM table_6593 WHERE "Delivered as" = 't413'