user: Question: How many episodes have a duration of 3?
Columns: ['Actor', 'Character', 'Duration', 'No. of series', 'Episodes']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['Tony Bignell', 'Matthew "Matt" Cobbett', 'Pilot, 1–3', '3', 23.0]
SQL:

assistant: SELECT COUNT("Episodes") FROM "Table" WHERE "Duration" = '3';