user: Question: What is the smallest production number for the LT series with the Dumb Patrol title?
Columns: ['Title', 'Series', 'Characters', 'Production Num.', 'Release date']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['Big Man from the North', 'LT', 'Bosko, Honey', 4500.0, '1931-01-XX']
SQL:

assistant: SELECT MIN("Production Num.") FROM "Table" WHERE "Series" = 'LT' AND "Title" = 'Dumb Patrol';