CREATE TABLE table_48912 ("Country" TEXT, "First store" TEXT, "Hypermarkets" TEXT, "Supermarkets" TEXT, "Hard Discounters" TEXT)

What country has a fire store of 1991 and a hard discounter of 397?
SELECT "Country" FROM table_48912 WHERE "First store" = '1991' AND "Hard Discounters" = '397'
SELECT "Country" FROM "table_48912" WHERE "First store" = '1991' AND "Hard Discounters" = '397'