user: ### NOW ANSWER:
Question: How many people wrote the episode with a production code of 2J5507?
Columns: ['No.', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code', 'U.S. viewers (million)']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, '"Pilot"', 'David Nutter', 'Jennifer Johnson', 'September20,2010', '296770', '7.31']
SQL:

assistant: SELECT COUNT("Written by") FROM "Table" WHERE "Production code" = '2J5507';