CREATE TABLE table_55815 ("Locomotive" TEXT, "Serial No" TEXT, "Entered service" TEXT, "Gauge" TEXT, "Livery" TEXT)

What is the date of entered service for the locomotive with a broad gauge and a serial no of 83-1018?
SELECT "Entered service" FROM table_55815 WHERE "Gauge" = 'broad' AND "Serial No" = '83-1018'
SELECT "Entered service" FROM "table_55815" WHERE "Gauge" = 'broad' AND "Serial No" = '83-1018'