what is the type when the averaging time is 1-hour and the standard is 0.12 ppm (235 μg/m³)?
CREATE TABLE "standards" (
  "pollutant" text,
  "type" text,
  "standard" text,
  "averaging_time" text,
  "regulatory_citation" text
);
SELECT "type" FROM "standards" WHERE "averaging_time"='1-hour' AND "standard"='0.12 ppm (235 μg/m³)';