Complex sentence: Whitecap Books, 2001 It was following "Ugliest Girl" that Kastner's fortunes took a turn for the worst, as no producer would take him on in a leading role, leading him to taking supporting roles in movies and television series.
Split into simpler sentences: Whitecap Books, 2001 It was following "Ugliest Girl" that Kastner's fortunes took a turn for the worse. No producer would take him on in a leading role, prompting him to take supporting roles in movies and television series.