For the prior occupation listed as assistant police commissioner (ret'd) what are the entire list of romanised name. 
CREATE TABLE "political_assistants" (
  "romanised_name" text,
  "chinese_name" text,
  "age_at_appointment" real,
  "foreign_nationality" text,
  "portfolio_attachment" text,
  "prior_occupation" text,
  "govt_salary" text
);
SELECT "romanised_name" FROM "political_assistants" WHERE "prior_occupation"='Assistant Police Commissioner (ret''d)';