What is the highest col for the prominence of 1,834 meters and elevation higher than 1,834 meters?
CREATE TABLE "and_neighbouring_islands" (
  "peak" text,
  "country" text,
  "elevation_m" real,
  "prominence_m" real,
  "col_m" real
);
SELECT MAX("col_m") FROM "and_neighbouring_islands" WHERE "prominence_m"='1,834' AND "elevation_m">'1,834';