user: ### NOW ANSWER:
Question: What is the highest production code of an episode written by Tim Loane?
Columns: ['No. overall', 'Title', 'Director', 'Writer', 'Original air date', 'Production code']
Types: ['real', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, '"Episode 1"', 'Richard Dale', 'Tim Loane', '21March2001', 101.0]
SQL:

assistant: SELECT MAX("Production code") FROM "Table" WHERE "Writer" = 'Tim Loane';