user: Question: How many titles were directed in series 79?
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: [73.0, 1.0, '"From the Grave"', 'Karen Gaviola', 'Ann Donahue & Elizabeth Devine', 'September19,2005', '19.21']
SQL:

assistant: SELECT COUNT("Directed by") FROM "Table" WHERE "No. in series" = 79.0;