CREATE TABLE table_21471 ("Game" FLOAT, "Date" TEXT, "Team" TEXT, "Score" TEXT, "High points" TEXT, "High rebounds" TEXT, "High assists" TEXT, "Location Attendance" TEXT, "Record" TEXT)

High points earned by Josh Howard (19) resulted in how many high rebounds?
SELECT COUNT("High rebounds") FROM table_21471 WHERE "High points" = 'Josh Howard (19)'
SELECT COUNT("High rebounds") FROM "table_21471" WHERE "High points" = 'Josh Howard (19)'