Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the highest number of Seats 2006 held by the communities of Bürger Für Groß-Rohrheim Party/Voter Community, with a %2006 less than 21.3?

### Inputs:
table_name: table, columns: ['Parties and voter communities', '% 2006', 'Seats 2006', '% 2001', 'Seats 2001']

### Response:
SELECT MAX Seats 2006 FROM table WHERE Parties and voter communities = bürger für groß-rohrheim AND % 2006 < 21.3