CREATE TABLE table_37947 ("Tournament" TEXT, "1998" TEXT, "1999" TEXT, "2000" TEXT, "2001" TEXT, "2002" TEXT, "2003" TEXT, "2004" TEXT, "2005" TEXT, "2006" TEXT, "2007" TEXT, "2008" TEXT, "2009" TEXT, "2010" TEXT, "2011" TEXT)

Which tournament's 2001 and 2006s were a?
SELECT "Tournament" FROM table_37947 WHERE "2001" = 'a' AND "2006" = 'a'
SELECT "Tournament" FROM "table_37947" WHERE "2001" = 'a' AND "2006" = 'a'