CREATE TABLE table_47071 ("Region" TEXT, "Physician  ( GP & specialist ) " FLOAT, "Physician : Population Ratio" TEXT, "Health Officer" FLOAT, "HO : Population Ratio" TEXT, "All Nurses" FLOAT, "Nurse : Population Ratio" TEXT, "Mid-wives" TEXT, "Mid Wife: Population Ratio" TEXT, "HEW*" TEXT)

What is the number of physicians in the region with an all nurses number of 91?
SELECT MIN("Physician (GP & specialist)") FROM table_47071 WHERE "All Nurses" = '91'
SELECT MIN("Physician (GP & specialist)") FROM "table_47071" WHERE "All Nurses" = '91'