user: Question: In season 5 what episode number was production 06-03-519?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: [86.0, 1.0, '"Vegas"', 'Bryan Cranston', 'Michael Glouberman & Andrew Orenstein', 'November 2, 2003', '06-03-501']
SQL:

assistant: SELECT "No. in season" FROM "Table" WHERE "Production code" = '06-03-519';