Question: Which Prominence (m) has a Peak of nakanai mountains high point, and an Elevation (m) smaller than 2316?
SQL: SELECT AVG("Prominence (m)") FROM "2-18946749-2" WHERE "Peak" = 'nakanai mountains high point' AND "Elevation (m)" < 2316.0;

Question: How much Col (m) has a Prominence (m) larger than 1897, and a Rank smaller than 6?
SQL: SELECT COUNT("Col (m)") FROM "2-18946749-2" WHERE "Prominence (m)" > 1897.0 AND "Rank" < 6.0;