user: ### NOW ANSWER:
Question: What is the weeks rank for the episode with the production code 1ALF05? 
Columns: ['No.', 'Title', 'Directed by', 'Written by', 'U.S. viewers (million)', 'Rank (week)', 'Original air date', 'Production code']
Types: ['real', 'text', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: [1.0, '"First Responders"', 'Davis Guggenheim', 'David Mamet', '18.50', 10.0, 'March7,2006', '1ALF79']
SQL:

assistant: SELECT MAX("Rank (week)") FROM "Table" WHERE "Production code" = '1ALF05';