user: Question: What chart positions did the album reach when EP was the format?
Columns: ['Album title', 'Format', 'Year', 'Original label', 'Chart positions']
Types: ['text', 'text', 'real', 'text', 'text']
Sample row: ['Distant Plastic Trees', 'LP', 1991.0, 'Red Flame', '—']
SQL:

assistant: SELECT "Chart positions" FROM "Table" WHERE "Format" = 'EP';