CREATE TABLE "effect_on_other_conventions" (
  "ilo_code" text,
  "field" text,
  "conclusion_date" text,
  "entry_into_force" text,
  "closure_for_signature" text,
  "parties_april_2011" real,
  "denunciations_september_2011" real,
  "revising_convention_s" text,
  "text_and_ratifications" text
);

Question: What were the revising conventions commentary with a denunciation of 21?
SQL: SELECT "revising_convention_s" FROM "effect_on_other_conventions" WHERE "denunciations_september_2011"=21;

Question: How many inputs are there in the 'closure for signature' tab under the field 'sea (revised)'?
SQL: SELECT COUNT("closure_for_signature") FROM "effect_on_other_conventions" WHERE "field"='Sea (revised)';

Question: How many ILO codes are there with revising conventions of 'this convention, work in fishing convention'?
SQL: SELECT COUNT("ilo_code") FROM "effect_on_other_conventions" WHERE "revising_convention_s"='this convention, Work in Fishing Convention';

Question: What  was the revising convention of the field 'trimmers and stokers'?
SQL: SELECT "revising_convention_s" FROM "effect_on_other_conventions" WHERE "field"='trimmers and stokers';