CREATE TABLE table_45250 ("Name" TEXT, "Country" TEXT, "Birth Date" TEXT, "Date" FLOAT, "Earned" TEXT, "Peak rating  ( Nov 2012 ) " FLOAT)

What country was the woman from who was born 1976-07-23 and became a grandmaster in 1991?
SELECT "Country" FROM table_45250 WHERE "Date" = '1991' AND "Birth Date" = '1976-07-23'
SELECT "Country" FROM "table_45250" WHERE "Birth Date" = '1976-07-23' AND "Date" = '1991'