Table: eujunbad_champs
Columns: year
mens_singles
womens_singles
mens_doubles
womens_doubles
mixed_doubles

Question: How many mens doubles when womens doubles is catrine bengtsson margit borg?
SQL: SELECT COUNT("mens_doubles") FROM eujunbad_champs WHERE "womens_doubles" = 'Catrine Bengtsson Margit Borg'

Question: Who is the mens doubles when womens doubles is anastasia chervyakova romina gabdullina?
SQL: SELECT "mens_doubles" FROM eujunbad_champs WHERE "womens_doubles" = 'Anastasia Chervyakova Romina Gabdullina'

Question: Who is themens doubles when the mens singles is flemming delfs?
SQL: SELECT "mens_doubles" FROM eujunbad_champs WHERE "mens_singles" = 'Flemming Delfs'

Question: Who was the womens doubles when the mixed doubles is jacco arends selena piek?
SQL: SELECT "womens_doubles" FROM eujunbad_champs WHERE "mixed_doubles" = 'Jacco Arends Selena Piek'

Question: Who was the mens doubles when womens singles is mette sørensen?
SQL: SELECT "mens_doubles" FROM eujunbad_champs WHERE "womens_singles" = 'Mette Sørensen'