Complex sentence: For the first eight seasons of the series, the character was known as Mr. Garrison but despite homophobic tendencies in season 1, underwent a sex change in the season 9 premiere "Mr. Garrison's Fancy New Vagina".
Split into simpler sentences: For the first eight seasons of the series, the character was known as Mr. Garrison. He underwent a sex change in the season 9 premiere "Mr. Garrison's Fancy New Vagina".