CREATE TABLE table_14143 ("Manufacturer" TEXT, "Transmission" TEXT, "Engine Capacity" FLOAT, "Fuel Type" TEXT, "L/100km Urban  ( Cold ) " FLOAT, "L/100km Extra-Urban" FLOAT, "L/100km Combined" FLOAT, "mpg-UK Urban  ( Cold ) " FLOAT, "mpg-UK Extra-Urban" FLOAT, "mpg-UK Combined" FLOAT, "mpg-US Urban" FLOAT, "mpg-US Extra-Urban" FLOAT, "mpg-US Combined" FLOAT, "CO 2 g/km" FLOAT, "Green Rating" TEXT)

What is the lowest MPG-US combined for a green rating of E, mpg in the UK- combined of under 42.2, manufacturer of Volkswagen, and an M6 transmission?
SELECT MIN("mpg-US Combined") FROM table_14143 WHERE "Green Rating" = 'e' AND "mpg-UK Combined" < '42.2' AND "Manufacturer" = 'volkswagen' AND "Transmission" = 'm6'
SELECT MIN("mpg-US Combined") FROM "table_14143" WHERE "Green Rating" = 'e' AND "Manufacturer" = 'volkswagen' AND "Transmission" = 'm6' AND "mpg-UK Combined" < '42.2'