CREATE TABLE table_23953 ("Position" FLOAT, "Race number" TEXT, "Sail number" TEXT, "Yacht" TEXT, "State/country" TEXT, "Yacht type" TEXT, "LOA  ( Metres ) " TEXT, "Skipper" TEXT, "Elapsed time d:hh:mm:ss" TEXT)

What is the race number with time 1:23:19:31?
SELECT "Race number" FROM table_23953 WHERE "Elapsed time d:hh:mm:ss" = '1:23:19:31'
SELECT "Race number" FROM "table_23953" WHERE "Elapsed time d:hh:mm:ss" = '1:23:19:31'