CREATE TABLE table_30053 ("Outcome" TEXT, "Edition" TEXT, "Opponent Team" TEXT, "Surface" TEXT, "Opponent" TEXT, "Score" TEXT)

For edition is 2011 europe/africa group iiib and surface where score is 6 4, 6 1 please specify all the surface
SELECT "Surface" FROM table_30053 WHERE "Score" = '6–4, 6–1' AND "Edition" = '2011 Europe/Africa Group IIIB'
SELECT "Surface" FROM "table_30053" WHERE "Edition" = '2011 Europe/Africa Group IIIB' AND "Score" = '6–4, 6–1'