What surface has 2 as a cage dive?
CREATE TABLE "encounters" (
  "1_person_dive" text,
  "2_person_dive" text,
  "3_person_dive" text,
  "surface" text,
  "cage_dive" text,
  "seal_turtle_decoy" text,
  "catch_release" text,
  "attached_camera" text,
  "remote_camera" text
);
SELECT "surface" FROM "encounters" WHERE "cage_dive"='2';