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_56802 ( "Parties and voter communities" text, "% 2006" real, "Seats 2006" real, "% 2001" real, "Seats 2001" real )

### Question ###
What is the highest number of Seats 2006 held by the communities of B rger F r Gro -Rohrheim Party/Voter Community, with a %2006 less than 21.3?

### Accurate SQL ###

SELECT MAX("Seats 2006") FROM table_56802 WHERE "Parties and voter communities" = 'bürger für groß-rohrheim' AND "% 2006" < '21.3'