user: Question: On what date were less than 10 built with a locomotive number of 31-35?
Columns: ['Class', 'Wheels', 'Date', 'No. built', 'Loco Nos.']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['H1', '4-4-2', '1905-6', 5.0, '37-41']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "No. built" < 10.0 AND "Loco Nos." = '31-35';