CREATE TABLE table_48273 ("Tournament" TEXT, "1984" TEXT, "1985" TEXT, "1986" TEXT, "1987" TEXT, "1988" TEXT, "1989" TEXT, "1990" TEXT, "1991" TEXT, "1992" TEXT, "1993" TEXT, "1994" TEXT, "1995" TEXT, "1996" TEXT, "Career SR" TEXT)

What is the 1991 when 1992 and 1990 are 1R?
SELECT "1991" FROM table_48273 WHERE "1992" = '1r' AND "1990" = '1r'
SELECT "1991" FROM "table_48273" WHERE "1990" = '1r' AND "1992" = '1r'