CREATE TABLE table_71404 ("As of September 1 ,  2012" TEXT, "vs. Protoss" TEXT, "vs. Terran" TEXT, "vs. Zerg" TEXT, "vs. all" TEXT)

What is the value vs. Zerg with a September 1, 2012 best streak?
SELECT "vs. Zerg" FROM table_71404 WHERE "As of September 1, 2012" = 'best streak'
SELECT "vs. Zerg" FROM "table_71404" WHERE "As of September 1, 2012" = 'best streak'