user: Question: How many number of series have the title "Call of Silence"?
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: [24.0, 1.0, '"See No Evil"', 'Thomas J. Wright', 'Chris Crowe', 'September28,2004', '14.33']
SQL:

assistant: SELECT COUNT("No. in series") FROM "Table" WHERE "Title" = '"Call of Silence"';