If the world record is the African record, what is the 1:53.28 total number?
CREATE TABLE "records" (
  "world_record" text,
  "jarmila_kratochv_lov_tch" text,
  "1_53_28" text,
  "munich_west_germany" text,
  "26_july_1983" text
);
SELECT COUNT("1_53_28") FROM "records" WHERE "world_record"='African record';