user: Question: What series had the title rank of Various?
Columns: ['Actor', 'Character', 'Title/Rank', 'Series', 'Years']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['David Suchet', 'Hercule Poirot', 'Various', '1-13', '1989–2013']
SQL:

assistant: SELECT "Series" FROM "Table" WHERE "Title/Rank" = 'Various';