CREATE TABLE table_47228 ("Game" FLOAT, "Date" TEXT, "Team" TEXT, "Score" TEXT, "High points" TEXT, "High rebounds" TEXT, "High assists" TEXT, "Location Attendance" TEXT, "Record" TEXT)

What is the highest number of rebounds of the san antonio spurs?
SELECT "High rebounds" FROM table_47228 WHERE "Team" = 'san antonio spurs'
SELECT "High rebounds" FROM "table_47228" WHERE "Team" = 'san antonio spurs'