CREATE TABLE table_74918 ("Race" TEXT, "Class ( es ) " TEXT, "Length/Duration" TEXT, "Circuit" TEXT, "Date" TEXT)

What is the length and duration of the race on April 19?
SELECT "Length/Duration" FROM table_74918 WHERE "Date" = 'april 19'
SELECT "Length/Duration" FROM "table_74918" WHERE "Date" = 'april 19'