CREATE TABLE table_79381 ("Event" TEXT, "Performance" TEXT, "Nation" TEXT, "Place" TEXT, "Date" TEXT)

Which place had a performance of 19.30 seconds by Jamaica?
SELECT "Place" FROM table_79381 WHERE "Nation" = 'jamaica' AND "Performance" = '19.30'
SELECT "Place" FROM "table_79381" WHERE "Nation" = 'jamaica' AND "Performance" = '19.30'