user: Question: How many directors directed episode 3 of the season?
Columns: ['Series #', 'Season #', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code', 'U.S. viewers (millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: [151.0, 1.0, '" My Jerks "', 'Michael Spiller', 'Angela Nissel', 'January6,2009', 801.0, '6.76']
SQL:

assistant: SELECT COUNT("Directed by") FROM "Table" WHERE "Season #" = 3.0;