How many Australians were in the UN commission on Korea?
CREATE TABLE "table1_10121127_1" (
  "un_operation_name" text,
  "un_operation_title" text,
  "location" text,
  "dates_of_australian_involvement" text,
  "number_of_australians_involved" text,
  "australian_role" text
);
SELECT COUNT("number_of_australians_involved") FROM "table1_10121127_1" WHERE "un_operation_title"='UN Commission on Korea';