CREATE TABLE table_13349 ("Parameter" TEXT, "Symbol" TEXT, "Best fit  ( WMAP only ) " TEXT, "Best fit  ( WMAP ,  extra parameter ) " TEXT, "Best fit  ( all data ) " TEXT)

What is the symbol when the best fit (WMAP, extra parameter) of , and a Best fit (WMAP only) is .4 .3?
SELECT "Symbol" FROM table_13349 WHERE "Best fit (WMAP, extra parameter)" = '–' AND "Best fit (WMAP only)" = '.4 ± .3'
SELECT "Symbol" FROM "table_13349" WHERE "Best fit (WMAP only)" = '.4 ± .3' AND "Best fit (WMAP, extra parameter)" = '–'