Please answer a question about the following article about Arnold Schwarzenegger:

Schwarzenegger announced his candidacy in the 2003 California recall election for Governor of California on the August 6, 2003 episode of The Tonight Show with Jay Leno. Schwarzenegger had the most name recognition in a crowded field of candidates, but he had never held public office and his political views were unknown to most Californians. His candidacy immediately became national and international news, with media outlets dubbing him the "Governator" (referring to The Terminator movies, see above) and "The Running Man" (the name of another one of his films), and calling the recall election "Total Recall" (yet another movie starring Schwarzenegger). Schwarzenegger declined to participate in several debates with other recall replacement candidates, and appeared in only one debate on September 24, 2003.

How many debates did Schwarzenegger participate in before the 2003 California recall election?
one