What is the Pinnacle height for Metcalf, Georgia?
CREATE TABLE "structures_past_or_present_600_m_and_tal" (
  "name" text,
  "pinnacle_height" text,
  "structure_type" text,
  "main_use" text,
  "town" text
);
SELECT "pinnacle_height" FROM "structures_past_or_present_600_m_and_tal" WHERE "town"='metcalf, georgia';