user: Question: Name the number of episodes for Sam Snape
Columns: ['Episode No. Episode No. refers to the episodes number in the overall series, whereas Series No. refers to the episodes number in this particular series.', 'Series No.', 'Episode', 'Director', 'Writer', 'Original airdate']
Types: ['real', 'real', 'text', 'text', 'text', 'text']
Sample row: [53.0, 1.0, '"Penalty"', 'Michael Owen Morris', 'Ginnie Hole', '7September1990']
SQL:

assistant: SELECT COUNT("Episode") FROM "Table" WHERE "Writer" = 'Sam Snape';