CREATE TABLE table_7833 ("Team" TEXT, "Head Coach" TEXT, "City" TEXT, "Stadium" TEXT, "Capacity" FLOAT)

What is the Capacity of the Rainer Kraft's Stadium?
SELECT AVG("Capacity") FROM table_7833 WHERE "Head Coach" = 'rainer kraft'
SELECT AVG("Capacity") FROM "table_7833" WHERE "Head Coach" = 'rainer kraft'