Which round was the circuit Assen
{'header': ['No', 'Date', 'Round', 'Circuit', 'Pole Position', 'Fastest Lap', 'Race Winner', 'Report'], 'page_title': '2008 Supersport World Championship season', 'section_title': 'Season calendar', 'caption': 'Season calendar', 'rows': [['1', '23 February', 'Qatar', 'Losail', 'Fabien Foret', 'Fabien Foret', 'Broc Parkes', 'Report'], ['2', '2 March', 'Australia', 'Phillip Island', 'Andrew Pitt', 'Robbin Harms', 'Andrew Pitt', 'Report'], ['3', '6 April', 'Spain', 'Valencia', 'Andrew Pitt', 'Broc Parkes', 'Joan Lascorz', 'Report'], ['4', '27 April', 'Netherlands', 'Assen', 'Broc Parkes', 'Gianluca Vizziello', 'Andrew Pitt', 'Report'], ['5', '11 May', 'Italy', 'Monza', 'Broc Parkes', 'Fabien Foret', 'Fabien Foret', 'Report'], ['6', '15 June', 'Germany', 'Nürburgring', 'Broc Parkes', 'Broc Parkes', 'Andrew Pitt', 'Report'], ['7', '29 June', 'San Marino', 'Misano', 'Broc Parkes', 'Broc Parkes', 'Andrew Pitt', 'Report'], ['8', '20 July', 'Czech Republic', 'Brno', 'Broc Parkes', 'Andrew Pitt', 'Jonathan Rea', 'Report'], ['9', '3 August', 'Great Britain', 'Brands Hatch', 'Matthieu Lagrive', 'Andrew Pitt', 'Jonathan Rea', 'Report'], ['10', '7 September', 'Europe', 'Donington Park', 'Matthieu Lagrive', 'Josh Brookes', 'Josh Brookes', 'Report'], ['11', '21 September', 'Italy', 'Vallelunga', 'Broc Parkes', 'Broc Parkes', 'Jonathan Rea', 'Report'], ['12', '5 October', 'France', 'Magny-Cours', 'Broc Parkes', 'Broc Parkes', 'Andrew Pitt', 'Report']]}