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_20061 ( "Class" text, "Wheels" real, "Date" text, "Builder" text, "No. built" real, "1919 nos." text, "LMS Class" text, "LMS nos." text )

### Question ###
What is the class when the LMS class is 3F?

### Accurate SQL ###

SELECT "Class" FROM table_20061 WHERE "LMS Class" = '3F'