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_74806 ( "Year" real, "Driver" text, "Nation of citizenship" text, "Racing series" text, "Type of vehicle" text )

### Question ###
What Nation of citizenship has a stock car vehicle with a year of 1999?

### Accurate SQL ###

SELECT "Nation of citizenship" FROM table_74806 WHERE "Type of vehicle" = 'stock car' AND "Year" = '1999'