Question: How many years entered service when there were 13 locomotives?
SQL: SELECT COUNT("Entered service") FROM "2-11129881-1" WHERE "Locomotive" = '13';

Question: Which locomotive had a 2-8-2T type, entered service year prior to 1915, and which was built after 1911?
SQL: SELECT "Locomotive" FROM "2-11129881-1" WHERE "Type" = '2-8-2T' AND "Entered service" < 1915.0 AND "Built" > 1911.0;