Context: CREATE TABLE table_name_18 (seats_in_hamburgische_bürgerschaft VARCHAR, abbr VARCHAR)
Question: WHAT IS THE TOTAL NUMBER OF SEATS IN Hamburgische Bürgerschaft WITH AN ABBR OF bündnis 90 / die grünen (gal)?
Answer: SELECT COUNT(seats_in_hamburgische_bürgerschaft) FROM table_name_18 WHERE abbr = "bündnis 90 / die grünen (gal)"