CREATE TABLE table_10725629_2 (rnd VARCHAR2, race_name VARCHAR2)

How many rounds were there of the Bosch Spark Plug Grand Prix?
SELECT COUNT(rnd) FROM table_10725629_2 WHERE race_name = "Bosch Spark Plug Grand Prix"
SELECT COUNT("rnd") FROM "table_10725629_2" WHERE "Bosch Spark Plug Grand Prix" = "race_name"