CREATE TABLE table_204_144 (id DECIMAL, "represent" DECIMAL, "contestant" TEXT, "age" DECIMAL, "height" TEXT, "hometown" TEXT)

which contestant is older , karol guevara or patricia de leon ?
SELECT "contestant" FROM table_204_144 WHERE "contestant" IN ('karol guevara', 'patricia de leon') ORDER BY "age" DESC LIMIT 1
SELECT "contestant" FROM "table_204_144" WHERE "contestant" IN ('karol guevara', 'patricia de leon') ORDER BY "age" DESC NULLS LAST LIMIT 1