user: Question: What series have Caroline Flack as a main presenter?
Columns: ['Series', 'Main presenter', 'Co-presenter', 'Comedian', 'UK co-presenter']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['One (2002)', 'Louise Loughman', 'N/A', 'N/A', 'N/A']
SQL:

assistant: SELECT "Series" FROM "Table" WHERE "Main presenter" = 'Caroline Flack';