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_name_40 ( start VARCHAR, category VARCHAR, year VARCHAR )

### Question ###
Name the start of an event in Catagory 2 of the year 1947.

### Accurate SQL ###

SELECT start FROM table_name_40 WHERE category = "2" AND year = 1947