What is the Date when yelena isinbayeva was the Athlete, with a Record of 4.90m(16ft0¾in)?
CREATE TABLE "record_progression" (
  "record" text,
  "athlete" text,
  "nation" text,
  "venue" text,
  "date" text
);
SELECT "date" FROM "record_progression" WHERE "athlete"='yelena isinbayeva' AND "record"='4.90m(16ft0¾in)';