CREATE TABLE table_name_34 (head_coach VARCHAR2, shirt_sponsor VARCHAR2)

Who is the head coach of the team, whose shirt sponsor is karstadt quelle versicherungen?
SELECT head_coach FROM table_name_34 WHERE shirt_sponsor = "karstadt quelle versicherungen"
SELECT "head_coach" FROM "table_name_34" WHERE "karstadt quelle versicherungen" = "shirt_sponsor"