user: ### NOW ANSWER:
Question: How many Volume Numbers have the title of Darkness Falls?
Columns: ['Vol. #', 'Title', 'Material collected', 'Publication date', 'ISBN']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Justice Be Done', 'JSA #1-5; JSA Secret Files #1', 'April 2000', '978-1563896200']
SQL:

assistant: SELECT SUM("Vol. #") FROM "Table" WHERE "Title" = 'Darkness Falls';