What is the time for the bike (40km) when the swim (1.5km) is 19:56?
CREATE TABLE "triathlon" (
  "athlete" text,
  "event" text,
  "swim_1_5km" text,
  "trans_1" text,
  "bike_40km" text,
  "trans_2" text,
  "run_10km" text,
  "total_time" text,
  "rank" real
);
SELECT "bike_40km" FROM "triathlon" WHERE "swim_1_5km"='19:56';