CREATE TABLE table_8737 ("Outcome" TEXT, "Year" FLOAT, "Championship" TEXT, "Surface" TEXT, "Partner" TEXT, "Opponents in final" TEXT, "Score in final" TEXT)

What is Championship, when Outcome is 'runner-up', and when Opponents In Final is 'Gigi Fern ndez Natalia Zvereva'?
SELECT "Championship" FROM table_8737 WHERE "Outcome" = 'runner-up' AND "Opponents in final" = 'gigi fernández natalia zvereva'
SELECT "Championship" FROM "table_8737" WHERE "Opponents in final" = 'gigi fernández natalia zvereva' AND "Outcome" = 'runner-up'