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_3566 ( "Contestant" text, "Place" real, "Age" real, "Country" text, "Federal state" text, "City" text, "Height" text, "Measurements (in cm)" text )

### Question ###
for how many federal states is the city of lahnstein listed in the ranking?

### Accurate SQL ###

SELECT COUNT("Federal state") FROM table_3566 WHERE "City" = 'Lahnstein'