user: Question: How many rounds have a Grand Prix of German GP?
Columns: ['Round', 'Race Title', 'Grand Prix', 'Circuit', 'Date']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Qantas Australian Grand Prix', 'Australian GP', 'Albert Park , Melbourne', '27 March']
SQL:

assistant: SELECT "Round" FROM "Table" WHERE "Grand Prix" = 'German GP';