CREATE TABLE table_76573 ("Tournament" TEXT, "Surface" TEXT, "Week" TEXT, "Winner and score" TEXT, "Finalist" TEXT, "Semifinalists" TEXT)

who was the semifinalist for the Key Biscane tournament?
SELECT "Semifinalists" FROM table_76573 WHERE "Tournament" = 'key biscane'
SELECT "Semifinalists" FROM "table_76573" WHERE "Tournament" = 'key biscane'