Complex sentence: He underwent a sex change in the season 9 premiere "Mr. Garrison's Fancy New Vagina", and was thereafter known to the other characters as Janet Garrison or simply Mrs. Garrison, despite being unmarried.
Split into simpler sentences: He underwent a sex change in the season 9 premiere "Mr. Garrison's Fancy New Vagina". The character was thereafter known to the other characters as Janet Garrison or Mrs. Garrison, despite being unmarried.