user: Question: how many people directed the episode that is called "Dead Inside"
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'U.S. viewers (millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: [93.0, 1.0, '"Veritas"', 'David Von Ancken', 'Zachary Reiter & Pam Veasey', 'September24,2008', '14.59']
SQL:

assistant: SELECT COUNT("Directed by") FROM "Table" WHERE "Title" = '"Dead Inside"';