CREATE TABLE table_14991 ("LT Nos" TEXT, "Year" FLOAT, "Bldr" TEXT, "Type" TEXT, "Notes" TEXT)

Bldr of mcw&f, and a Notes of 'mv'; converted from steam stock, 1927, and a Year of 1920, and a LT Nos of 9716-9718 has what type?
SELECT "Type" FROM table_14991 WHERE "Bldr" = 'mcw&f' AND "Notes" = 'mv"; converted from steam stock, 1927' AND "Year" = '1920' AND "LT Nos" = '9716-9718'
SELECT "Type" FROM "table_14991" WHERE "Bldr" = 'mcw&f' AND "LT Nos" = '9716-9718' AND "Notes" = 'mv"; converted from steam stock, 1927' AND "Year" = '1920'