What was the minimum vertical measurement if the aspect ratio is 16:9 and scanning is interlaced?
CREATE TABLE "table1_272313_1" (
  "vertical" real,
  "horizontal" real,
  "aspect_ratio" text,
  "pixel_aspect_ratio" text,
  "scanning" text,
  "frame_rate_hz" text
);
SELECT MIN("vertical") FROM "table1_272313_1" WHERE "aspect_ratio"='16:9' AND "scanning"='interlaced';