user: Question: Who is the director for the series # 39?
Columns: ['Series #', 'Season #', 'Title', 'Directed by:', 'Written by:', 'Original airdate']
Types: ['real', 'real', 'text', 'text', 'text', 'text']
Sample row: [27.0, 1.0, '"Safe at First Base"', 'Michael Lembeck', 'Earl Pomerantz , Rick Hawkins', 'September17,1990']
SQL:

assistant: SELECT "Directed by:" FROM "Table" WHERE "Series #" = 39.0;