What is the democratic coalation when together we can do more is sergio castro ( pc )?
CREATE TABLE "chamber_of_deputies" (
  "dist" real,
  "democratic_coalition" text,
  "alliance" text,
  "together_we_can_do_more" text,
  "independent_regional_force" text,
  "independents" text
);
SELECT "democratic_coalition" FROM "chamber_of_deputies" WHERE "together_we_can_do_more"='Sergio Castro ( PC )';