Table: cobbled_classics_results
Columns: year
e3_harelbeke_bel
gent_wevelgem_bel
tour_of_flanders_bel
paris_roubaix_fra

Question: Who won the Paris-Roubaix in 2006?
SQL: SELECT "paris_roubaix_fra" FROM cobbled_classics_results WHERE "year" = 2006