user: Question: What is the date of entered service for the locomotive with a Broad gauge and a serial no of 83-1018?
Columns: ['Locomotive', 'Serial No', 'Entered service', 'Gauge', 'Livery']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['BL26', '83-1010', 'March 1983', 'Standard', 'Pacific National blue & yellow']
SQL:

assistant: SELECT "Entered service" FROM "Table" WHERE "Gauge" = 'Broad' AND "Serial No" = '83-1018';