Question: What driving wheels are on the M1 original NER class?
SQL: SELECT "Driving wheels" FROM "2-17181920-1" WHERE "Original NER class" = 'M1';

Question: What is the LNER class with an M 1914 NER class?
SQL: SELECT "LNER Class" FROM "2-17181920-1" WHERE "1914 NER class" = 'M';

Question: What is the 1914 NER class with a D17/2 LNER class?
SQL: SELECT "1914 NER class" FROM "2-17181920-1" WHERE "LNER Class" = 'D17/2';