Which Elevation (m) has a Prominence (m) smaller than 2,456, and a Peak of mount kyllini, and a Col (m) smaller than 506?
CREATE TABLE "and" (
  "peak" text,
  "country" text,
  "elevation_m" real,
  "prominence_m" real,
  "col_m" real
);
SELECT MAX("elevation_m") FROM "and" WHERE "prominence_m"<'2,456' AND "peak"='mount kyllini' AND "col_m"<506;