user: Question: What is the production code for the episode directed by Sam Weisman?
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: [44.0, 1.0, '"Hey, Lick Me Over"', 'Rick Wallace', 'Steven Bochco and David E. Kelley', 'November3,1988', '7A01']
SQL:

assistant: SELECT "Production code" FROM "Table" WHERE "Directed by" = 'Sam Weisman';