CREATE TABLE table_13713 ("Year" FLOAT, "MISS EARTH" TEXT, "Miss Air  ( 1st Runner-up ) " TEXT, "Miss Water  ( 2nd Runner-up ) " TEXT, "Miss Fire  ( 3rd Runner-up ) " TEXT)

What year was Caroline Medina Miss Fire (3rd Runner-up)?
SELECT AVG("Year") FROM table_13713 WHERE "Miss Fire (3rd Runner-up)" = 'caroline medina'
SELECT AVG("Year") FROM "table_13713" WHERE "Miss Fire (3rd Runner-up)" = 'caroline medina'