Who was the radio commentator when the final television commentator was John Dunn? 
CREATE TABLE table_17766232_7 (radio_commentator VARCHAR, final_television_commentator VARCHAR)
SELECT radio_commentator FROM table_17766232_7 WHERE final_television_commentator = "John Dunn"
### Context: CREATE TABLE table_17766232_7 (radio_commentator VARCHAR, final_television_commentator VARCHAR) ### Question: Who was the radio commentator when the final television commentator was John Dunn?  ### Answer: SELECT radio_commentator FROM table_17766232_7 WHERE final_television_commentator = "John Dunn"