user: Question: Who was the Locomotive superintendent has a NER class of D45?
Columns: ['Locomotive superintendent', 'GNoSR Class', 'LNER class', 'Quantity Built', 'Passed to LNER', 'Manufacturer', 'Date introduced']
Types: ['text', 'text', 'text', 'real', 'real', 'text', 'text']
Sample row: ['William Cowan (1857–83)', 'K', 'D47/2', 6.0, 3.0, 'Neilson & Co.', '1866']
SQL:

assistant: SELECT "Locomotive superintendent" FROM "Table" WHERE "LNER class" = 'D45';