Table: national_bl_locomotive
Columns: locomotive
serial_no
entered_service
gauge
livery

Question: What is the livery of the locomotive with a serial number 83-1010?
SQL: SELECT "livery" FROM national_bl_locomotive WHERE "serial_no" = '83-1010'

Question: What is the livery on the locomotive with a serial number 83-1011?
SQL: SELECT "livery" FROM national_bl_locomotive WHERE "serial_no" = '83-1011'

Question: What is the locomotive with a standard gauge and a serial number of 83-1015?
SQL: SELECT "locomotive" FROM national_bl_locomotive WHERE "gauge" = 'standard' AND "serial_no" = '83-1015'

Question: What is the date of entered service for the locomotive with a broad gauge and a serial no of 83-1018?
SQL: SELECT "entered_service" FROM national_bl_locomotive WHERE "gauge" = 'broad' AND "serial_no" = '83-1018'