user: Question: What is the highest Year, when Extra is Pentathlon?
Columns: ['Year', 'Tournament', 'Venue', 'Result', 'Extra']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [2007.0, 'European U23 Championships', 'Debrecen , Hungary', '2nd', 'Heptathlon']
SQL:

assistant: SELECT MAX("Year") FROM "Table" WHERE "Extra" = 'Pentathlon';