Table: 2011 world rally championship season
[['round', 'finishing date', 'rally name', 'rally base', 'surface', 'support category'], ['1', '10 - 13 february', 'rally sweden', 'karlstad', 'snow', 'pwrc'], ['2', '3 - 6 march', 'rally guanajuato mexico', 'león', 'gravel', 'swrc'], ['3', '24 - 27 march', 'vodafone rally de portugal', 'faro', 'gravel', 'pwrc / wrc academy'], ['4', '14 - 16 april', 'jordan rally', 'amman', 'gravel', 'swrc'], ['5', '5 - 8 may', "rally d'italia sardegna", 'olbia', 'gravel', 'swrc / wrc academy'], ['6', '26 - 29 may', 'rally argentina', 'villa carlos paz', 'gravel', 'pwrc'], ['7', '16 - 19 june', 'acropolis rally', 'loutraki', 'gravel', 'swrc'], ['8', '28 - 30 july', 'neste oil rally finland', 'jyväskylä', 'gravel', 'swrc / pwrc / wrc academy'], ['9', '18 - 21 august', 'adac rallye deutschland', 'trier', 'asphalt', 'swrc / wrc academy'], ['10', '8 - 11 september', 'rally australia', 'coffs harbour', 'gravel', 'pwrc'], ['11', '29 september - 2 october', 'rallye de france alsace', 'strasbourg', 'asphalt', 'swrc / wrc academy'], ['12', '20 - 23 october', 'rallyracc - rally of spain', 'salou', 'asphalt & gravel', 'swrc / pwrc']]
Statement: race occurred on Gravel Surface a total of 8 time
Statement: race occurred on Asphalt & Gravel and Snow Surface 1 time each
Statement: Trier served as the Rally Base for the Adac Rallye Deutschland and Karlstad served as the Rally Base for Rally Sweden
Statement: all race took place from February of 2001 to October of 2011
Statement: both March and May had 2 separate race while February and April each had only 1 race