CREATE TABLE table_63031 ("Rank" FLOAT, "Peak" TEXT, "Country" TEXT, "Island" TEXT, "Elevation  ( m ) " FLOAT, "Prominence  ( m ) " FLOAT, "Col  ( m ) " FLOAT)

Which Prominence (m) has a Peak of nakanai mountains high point, and an Elevation (m) smaller than 2,316?
SELECT AVG("Prominence (m)") FROM table_63031 WHERE "Peak" = 'nakanai mountains high point' AND "Elevation (m)" < '2,316'
SELECT AVG("Prominence (m)") FROM "table_63031" WHERE "Elevation (m)" < '2,316' AND "Peak" = 'nakanai mountains high point'